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6k72

eIF2(aP) - eIF2B complex

Method: ELECTRON MICROSCOPY Dmax: 200.8 Å Quality: GOOD
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Translation initiation factor eIF-2B subunit alpha

Homo sapiens

UniProt Q14232

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain A； UniProt 1–305 Chain B； UniProt 1–305 Not recorded Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
3ECS Crystal structure of human eIF2B alpha Deposited 2008-09-01 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein homooligomer Homooligomer；Protein × 8 PDB declaration: octameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Chain C 1–305（305 aa）
Chain D 1–305（305 aa）
Chain E 1–305（305 aa）
Chain F 1–305（305 aa）
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) SO4 SULFATE ION × 10 CL CHLORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.5；293 K；0.1M Sodium Citrate buffer(pH 4.5), 0.1M Ammonium Sulfate, 13% polyethylene glycol(PEG) 4000, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 2.65 Å R-free 0.273
6CAJ Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens Deposited 2018-01-31 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
6EZO Eukaryotic initiation factor EIF2B in complex with ISRIB Deposited 2017-11-16 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6O9Z Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-15 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7D44 eIF2B-eIF2(aP), aP2 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7D45 eIF2B-eIF2(aP), aP1 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7D46 eIF2B apo Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7F64 eIF2B-SFSV NSs Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.42 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7KMA Crystal structure of eif2Balpha with a ligand. Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain A 1–305（305 aa）
Chain C 1–305（305 aa）
Not recorded M6P 6-O-phosphono-alpha-D-mannopyranose × 2 ACT ACETATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；291 K；12% PEG 4000, 100 mM sodium acetate, 100 mM ammonium sulfate, 0.5% octyl-beta-glucoside, pH 4.6
Resolution 2.70 Å R-free 0.238
7KMA Crystal structure of eif2Balpha with a ligand. Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain B 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded M6P 6-O-phosphono-alpha-D-mannopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；291 K；12% PEG 4000, 100 mM sodium acetate, 100 mM ammonium sulfate, 0.5% octyl-beta-glucoside, pH 4.6
Resolution 2.70 Å R-free 0.238
7KMA Crystal structure of eif2Balpha with a ligand. Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain D 1–305（305 aa）
Chain E 1–305（305 aa）
Not recorded M6P 6-O-phosphono-alpha-D-mannopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；291 K；12% PEG 4000, 100 mM sodium acetate, 100 mM ammonium sulfate, 0.5% octyl-beta-glucoside, pH 4.6
Resolution 2.70 Å R-free 0.238
7KMA Crystal structure of eif2Balpha with a ligand. Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 4 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain F 1–305（305 aa）
Chain G 1–305（305 aa）
Not recorded M6P 6-O-phosphono-alpha-D-mannopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；291 K；12% PEG 4000, 100 mM sodium acetate, 100 mM ammonium sulfate, 0.5% octyl-beta-glucoside, pH 4.6
Resolution 2.70 Å R-free 0.238
7KMF Sugar phosphate activation of the stress sensor eIF2B Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded F6P 6-O-phosphono-beta-D-fructofuranose × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；Prior to grid preparation, the protein mixture was diluted with 25 mM HEPES, 100 mM KCl, 2 mM 446 MgCl2, 1 mM DTT, pH 7.5 to
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.91 Å
7L70 The eukaryotic translation initiation factor 2B from Homo sapiens in its apo form Deposited 2020-12-24 Different construct Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 2–305（304 aa）
Chain H 2–305（304 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7L7G Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens (updated model of PDB ID: 6CAJ) Deposited 2020-12-28 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7RLO Structure of the human eukaryotic translation initiation factor 2B (eIF2B) in complex with a viral protein NSs Deposited 2021-07-26 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
7TRJ The eukaryotic translation initiation factor 2B from Homo sapiens with a H160D mutation in the beta subunit Deposited 2022-01-29 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 1–305（305 aa）
Chain H 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7VLK eIF2B-SFSV NSs C2-imposed Deposited 2021-10-04 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.27 Å
8TQZ Eukaryotic translation initiation factor 2B with a mutation (L516A) in the delta subunit Deposited 2023-08-08 Different construct Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 2–305（304 aa）
Chain H 2–305（304 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9HVD Native human P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9QC6 Structure of eIF2B decamer bound to (P)eIF2 alpha and Compound A-(S) Deposited 2025-03-04 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: 11-meric
Chain A 1–305（305 aa）
Chain B 1–305（305 aa）
Not recorded A1I5O ~{N}-[(1~{S})-7-[3-[[ethanoyl(methyl)amino]methyl]phenyl]-5-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-yl]-2-[[(3~{R},4~{S})-3-fluoranylpiperidin-4-yl]methoxy]-~{N}-methyl-ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å
9ZUZ Translation Initiation Factor eIF-2B complex with the Isohexide Diamine GSK735 Deposited 2025-12-29 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric
Chain A 1–305（305 aa）
Not recorded PRO PROLINE × 2 SO4 SULFATE ION × 4 EDO 1,2-ETHANEDIOL × 2 A1C32 1,4:3,6-dianhydro-2,5-bis[2-(4-chlorophenoxy)acetamido]-2,5-dideoxy-D-glucitol × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；277 K；0.2 M Proline, 0.1 M hepes pH 7.5, 8.6 % Peg3350
Resolution 2.25 Å R-free 0.237

26 other PDB entries and 29 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name EI2BA_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–305； UniProt 1–305 Author chain B； PDBConstruct 1–305； UniProt 1–305

Translation initiation factor eIF-2B subunit beta

Homo sapiens

UniProt P49770

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain C； UniProt 1–351 Chain D； UniProt 1–351 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
12FH Structure of eIF2B bound to a activator Deposited 2026-04-01 Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.50 Å R-free 0.271
6CAJ Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens Deposited 2018-01-31 Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
6EZO Eukaryotic initiation factor EIF2B in complex with ISRIB Deposited 2017-11-16 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 5–351（347 aa）
Chain D 5–351（347 aa）
Mutation：3xFLAG inserted at position +4 of the protein sequence Mutation：3xFLAG inserted at position +4 of the protein sequence C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6O9Z Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-15 Different construct Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7D44 eIF2B-eIF2(aP), aP2 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7D45 eIF2B-eIF2(aP), aP1 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7D46 eIF2B apo Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7F64 eIF2B-SFSV NSs Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.42 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7KMF Sugar phosphate activation of the stress sensor eIF2B Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded F6P 6-O-phosphono-beta-D-fructofuranose × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；Prior to grid preparation, the protein mixture was diluted with 25 mM HEPES, 100 mM KCl, 2 mM 446 MgCl2, 1 mM DTT, pH 7.5 to
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.91 Å
7L70 The eukaryotic translation initiation factor 2B from Homo sapiens in its apo form Deposited 2020-12-24 Different construct Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7L7G Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens (updated model of PDB ID: 6CAJ) Deposited 2020-12-28 Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7RLO Structure of the human eukaryotic translation initiation factor 2B (eIF2B) in complex with a viral protein NSs Deposited 2021-07-26 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
7TRJ The eukaryotic translation initiation factor 2B from Homo sapiens with a H160D mutation in the beta subunit Deposited 2022-01-29 Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Mutation：H160D Mutation：H160D No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7VLK eIF2B-SFSV NSs C2-imposed Deposited 2021-10-04 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.27 Å
8TQO Eukaryotic translation initiation factor 2B tetramer Deposited 2023-08-08 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric
Chain D 2–351（350 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8TQZ Eukaryotic translation initiation factor 2B with a mutation (L516A) in the delta subunit Deposited 2023-08-08 Different construct Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain C 2–351（350 aa）
Chain D 2–351（350 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9HVD Native human P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9QC6 Structure of eIF2B decamer bound to (P)eIF2 alpha and Compound A-(S) Deposited 2025-03-04 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: 11-meric
Chain C 1–351（351 aa）
Chain D 1–351（351 aa）
Not recorded A1I5O ~{N}-[(1~{S})-7-[3-[[ethanoyl(methyl)amino]methyl]phenyl]-5-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-yl]-2-[[(3~{R},4~{S})-3-fluoranylpiperidin-4-yl]methoxy]-~{N}-methyl-ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å
9ZUZ Translation Initiation Factor eIF-2B complex with the Isohexide Diamine GSK735 Deposited 2025-12-29 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric
Chain B 1–351（351 aa）
Not recorded PRO PROLINE × 2 SO4 SULFATE ION × 4 EDO 1,2-ETHANEDIOL × 2 A1C32 1,4:3,6-dianhydro-2,5-bis[2-(4-chlorophenoxy)acetamido]-2,5-dideoxy-D-glucitol × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；277 K；0.2 M Proline, 0.1 M hepes pH 7.5, 8.6 % Peg3350
Resolution 2.25 Å R-free 0.237

26 other PDB entries and 26 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name EI2BB_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain C； PDBConstruct 1–351； UniProt 1–351 Author chain D； PDBConstruct 1–351； UniProt 1–351

Translation initiation factor eIF-2B subunit gamma

Homo sapiens

UniProt Q9NR50

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain E； UniProt 1–452 Chain F； UniProt 1–452 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
6CAJ Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens Deposited 2018-01-31 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
6EZO Eukaryotic initiation factor EIF2B in complex with ISRIB Deposited 2017-11-16 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6O9Z Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-15 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7D44 eIF2B-eIF2(aP), aP2 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7D45 eIF2B-eIF2(aP), aP1 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7D46 eIF2B apo Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7F64 eIF2B-SFSV NSs Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.42 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7KMF Sugar phosphate activation of the stress sensor eIF2B Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain J 1–452（452 aa）
Chain K 1–452（452 aa）
Not recorded F6P 6-O-phosphono-beta-D-fructofuranose × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；Prior to grid preparation, the protein mixture was diluted with 25 mM HEPES, 100 mM KCl, 2 mM 446 MgCl2, 1 mM DTT, pH 7.5 to
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.91 Å
7L70 The eukaryotic translation initiation factor 2B from Homo sapiens in its apo form Deposited 2020-12-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7L7G Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens (updated model of PDB ID: 6CAJ) Deposited 2020-12-28 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7RLO Structure of the human eukaryotic translation initiation factor 2B (eIF2B) in complex with a viral protein NSs Deposited 2021-07-26 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
7TRJ The eukaryotic translation initiation factor 2B from Homo sapiens with a H160D mutation in the beta subunit Deposited 2022-01-29 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7VLK eIF2B-SFSV NSs C2-imposed Deposited 2021-10-04 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.27 Å
8TQO Eukaryotic translation initiation factor 2B tetramer Deposited 2023-08-08 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric
Chain I 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8TQZ Eukaryotic translation initiation factor 2B with a mutation (L516A) in the delta subunit Deposited 2023-08-08 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–452（452 aa）
Chain J 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9HVD Native human P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9HVF Native human PPP1R15B-P-eIF2-eIF2B complex Deposited 2024-12-27 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain E 1–452（452 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
9QC6 Structure of eIF2B decamer bound to (P)eIF2 alpha and Compound A-(S) Deposited 2025-03-04 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: 11-meric
Chain E 1–452（452 aa）
Chain F 1–452（452 aa）
Not recorded A1I5O ~{N}-[(1~{S})-7-[3-[[ethanoyl(methyl)amino]methyl]phenyl]-5-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-yl]-2-[[(3~{R},4~{S})-3-fluoranylpiperidin-4-yl]methoxy]-~{N}-methyl-ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å

25 other PDB entries and 25 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name EI2BG_HUMAN
Isoform —
PDB entities 3
Chains and sequence ranges Author chain E； PDBConstruct 1–452； UniProt 1–452 Author chain F； PDBConstruct 1–452； UniProt 1–452

Translation initiation factor eIF-2B subunit delta

Homo sapiens

UniProt Q9UI10

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain G； UniProt 1–523 Chain H； UniProt 1–523 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
12FH Structure of eIF2B bound to a activator Deposited 2026-04-01 Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain A 2–543（542 aa）
Chain B 2–543（542 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.50 Å R-free 0.271
6CAJ Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens Deposited 2018-01-31 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
6EZO Eukaryotic initiation factor EIF2B in complex with ISRIB Deposited 2017-11-16 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6O9Z Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-15 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7D44 eIF2B-eIF2(aP), aP2 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7D45 eIF2B-eIF2(aP), aP1 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7D46 eIF2B apo Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7F64 eIF2B-SFSV NSs Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.42 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7KMF Sugar phosphate activation of the stress sensor eIF2B Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded F6P 6-O-phosphono-beta-D-fructofuranose × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；Prior to grid preparation, the protein mixture was diluted with 25 mM HEPES, 100 mM KCl, 2 mM 446 MgCl2, 1 mM DTT, pH 7.5 to
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.91 Å
7L70 The eukaryotic translation initiation factor 2B from Homo sapiens in its apo form Deposited 2020-12-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7L7G Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens (updated model of PDB ID: 6CAJ) Deposited 2020-12-28 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7RLO Structure of the human eukaryotic translation initiation factor 2B (eIF2B) in complex with a viral protein NSs Deposited 2021-07-26 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
7TRJ The eukaryotic translation initiation factor 2B from Homo sapiens with a H160D mutation in the beta subunit Deposited 2022-01-29 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7VLK eIF2B-SFSV NSs C2-imposed Deposited 2021-10-04 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.27 Å
8TQO Eukaryotic translation initiation factor 2B tetramer Deposited 2023-08-08 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric
Chain E 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8TQZ Eukaryotic translation initiation factor 2B with a mutation (L516A) in the delta subunit Deposited 2023-08-08 Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain E 1–523（523 aa）
Chain F 1–523（523 aa）
Mutation：L516A Mutation：L516A No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9HVD Native human P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9QC6 Structure of eIF2B decamer bound to (P)eIF2 alpha and Compound A-(S) Deposited 2025-03-04 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: 11-meric
Chain G 1–523（523 aa）
Chain H 1–523（523 aa）
Not recorded A1I5O ~{N}-[(1~{S})-7-[3-[[ethanoyl(methyl)amino]methyl]phenyl]-5-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-yl]-2-[[(3~{R},4~{S})-3-fluoranylpiperidin-4-yl]methoxy]-~{N}-methyl-ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å
9ZUZ Translation Initiation Factor eIF-2B complex with the Isohexide Diamine GSK735 Deposited 2025-12-29 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric
Chain D 164–523（360 aa）
Not recorded PRO PROLINE × 2 SO4 SULFATE ION × 4 EDO 1,2-ETHANEDIOL × 2 A1C32 1,4:3,6-dianhydro-2,5-bis[2-(4-chlorophenoxy)acetamido]-2,5-dideoxy-D-glucitol × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；277 K；0.2 M Proline, 0.1 M hepes pH 7.5, 8.6 % Peg3350
Resolution 2.25 Å R-free 0.237

26 other PDB entries and 26 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name EI2BD_HUMAN
Isoform —
PDB entities 4
Chains and sequence ranges Author chain G； PDBConstruct 1–523； UniProt 1–523 Author chain H； PDBConstruct 1–523； UniProt 1–523

Translation initiation factor eIF-2B subunit epsilon

Homo sapiens

UniProt Q13144

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain I； UniProt 1–721 Chain J； UniProt 1–721 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
3JUI Crystal Structure of the C-terminal Domain of Human Translation Initiation Factor eIF2B epsilon Subunit Deposited 2009-09-15 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 548–721（174 aa） Fragment：C-terminal Domain
Mutation：E678G Non-standard monomer：Yes (specific site not provided by mmCIF) GOL GLYCEROL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 7.7；289 K；PEG8000, Calcium acetate, Sodium Cocadylate, pH 7.7, vapor diffusion, temperature 289K
Resolution 2.00 Å R-free 0.279
6CAJ Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens Deposited 2018-01-31 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
6EZO Eukaryotic initiation factor EIF2B in complex with ISRIB Deposited 2017-11-16 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6O9Z Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-15 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7D44 eIF2B-eIF2(aP), aP2 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7D45 eIF2B-eIF2(aP), aP1 complex Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7D46 eIF2B apo Deposited 2020-09-22 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7F64 eIF2B-SFSV NSs Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.42 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7KMF Sugar phosphate activation of the stress sensor eIF2B Deposited 2020-11-02 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain B 1–721（721 aa）
Chain I 1–721（721 aa）
Not recorded F6P 6-O-phosphono-beta-D-fructofuranose × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；Prior to grid preparation, the protein mixture was diluted with 25 mM HEPES, 100 mM KCl, 2 mM 446 MgCl2, 1 mM DTT, pH 7.5 to
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.91 Å
7L70 The eukaryotic translation initiation factor 2B from Homo sapiens in its apo form Deposited 2020-12-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7L7G Electron cryo-microscopy of the eukaryotic translation initiation factor 2B from Homo sapiens (updated model of PDB ID: 6CAJ) Deposited 2020-12-28 Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Mutation：I587V Mutation：I587V C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7RLO Structure of the human eukaryotic translation initiation factor 2B (eIF2B) in complex with a viral protein NSs Deposited 2021-07-26 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
7TRJ The eukaryotic translation initiation factor 2B from Homo sapiens with a H160D mutation in the beta subunit Deposited 2022-01-29 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7VLK eIF2B-SFSV NSs C2-imposed Deposited 2021-10-04 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.27 Å
8TQO Eukaryotic translation initiation factor 2B tetramer Deposited 2023-08-08 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric
Chain A 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8TQZ Eukaryotic translation initiation factor 2B with a mutation (L516A) in the delta subunit Deposited 2023-08-08 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric
Chain A 1–721（721 aa）
Chain B 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9HVD Native human P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9QC6 Structure of eIF2B decamer bound to (P)eIF2 alpha and Compound A-(S) Deposited 2025-03-04 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: 11-meric
Chain I 1–721（721 aa）
Chain J 1–721（721 aa）
Not recorded A1I5O ~{N}-[(1~{S})-7-[3-[[ethanoyl(methyl)amino]methyl]phenyl]-5-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-yl]-2-[[(3~{R},4~{S})-3-fluoranylpiperidin-4-yl]methoxy]-~{N}-methyl-ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å

25 other PDB entries and 25 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name EI2BE_HUMAN
Isoform —
PDB entities 5
Chains and sequence ranges Author chain I； PDBConstruct 1–721； UniProt 1–721 Author chain J； PDBConstruct 1–721； UniProt 1–721

Eukaryotic translation initiation factor 2 subunit 1

Homo sapiens

UniProt P05198

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain K； UniProt 1–315 Chain L； UniProt 1–315 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
1KL9 Crystal structure of the N-terminal segment of Human eukaryotic initiation factor 2alpha Deposited 2001-12-11 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–182（182 aa） Fragment：residues 1-182
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；295 K；PEG 4000, sodium acetate, zinc chloride, pH 5.5, VAPOR DIFFUSION, SITTING DROP at 295K
Resolution 1.90 Å R-free 0.233
1KL9 Crystal structure of the N-terminal segment of Human eukaryotic initiation factor 2alpha Deposited 2001-12-11 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain A 1–182（182 aa） Fragment：residues 1-182
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 8 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；295 K；PEG 4000, sodium acetate, zinc chloride, pH 5.5, VAPOR DIFFUSION, SITTING DROP at 295K
Resolution 1.90 Å R-free 0.233
1KL9 Crystal structure of the N-terminal segment of Human eukaryotic initiation factor 2alpha Deposited 2001-12-11 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain A 1–182（182 aa） Fragment：residues 1-182
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 8 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；295 K；PEG 4000, sodium acetate, zinc chloride, pH 5.5, VAPOR DIFFUSION, SITTING DROP at 295K
Resolution 1.90 Å R-free 0.233
1Q8K Solution structure of alpha subunit of human eIF2 Deposited 2003-08-21 Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 4–302（299 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；298 K；Ionic strength (raw mmCIF value) 1.1；Pressure 1
Resolution not provided
28ZU human 48S PIC with Kozak mRNA and eIF1A W70A mutant Deposited 2026-03-03 Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 38 PDB declaration: 41-meric
Chain D 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.20 Å
28ZV human 48S PIC with mRNA (non-Kozak) Deposited 2026-03-03 Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 38 PDB declaration: 41-meric
Chain D 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.90 Å
28ZX human 48S PIC with mRNA (Kozak_1) Deposited 2026-03-03 Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain D 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.80 Å
28ZY human 48S PIC with mRNA (Kozak_2) Deposited 2026-03-03 Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain D 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.00 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain K 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain L 1–315（315 aa）
Chain M 1–315（315 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain L 2–315（314 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6O9Z Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-15 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain L 2–315（314 aa）
Chain M 2–315（314 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6YBV Structure of a human 48S translational initiation complex - eIF2-TC Deposited 2020-03-17 Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 3 PDB declaration: pentameric
Chain r 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
6ZMW Structure of a human 48S translational initiation complex Deposited 2020-07-04 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric
Chain r 1–315（315 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 89 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 Å
6ZP4 SARS-CoV-2 Nsp1 bound to a human 43S preinitiation ribosome complex - state 2 Deposited 2020-07-08 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric
Chain O 1–315（315 aa）
Not recorded ZN ZINC ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
7A09 Structure of a human ABCE1-bound 43S pre-initiation complex - State III Deposited 2020-08-07 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric
Chain O 1–315（315 aa）
Not recorded ZN ZINC ION × 4 SF4 IRON/SULFUR CLUSTER × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 3 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MET METHIONINE × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different mutation/modification Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain K 1–315（315 aa）
Chain L 1–315（315 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7D44 eIF2B-eIF2(aP), aP2 complex Deposited 2020-09-22 Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric
Chain K 1–315（315 aa）
Chain L 1–315（315 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7D45 eIF2B-eIF2(aP), aP1 complex Deposited 2020-09-22 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric
Chain K 1–315（315 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain N 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain N 1–315（315 aa）
Chain Q 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7NZM Cryo-EM structure of pre-dephosphorylation complex of phosphorylated eIF2alpha with trapped holophosphatase (PP1A_D64A/PPP1R15A/G-actin/DNase I) Deposited 2021-03-24 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Insufficient information Heteromer；Protein × 5 PDB declaration: pentameric
Chain E 2–187（186 aa）
Mutation：phosphorylated Ser51 Non-standard monomer：Yes (specific site not provided by mmCIF) MN MANGANESE (II) ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4；0.22mM Triton X-100 was added into the solution before plunging.
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.96 Å
7QP6 Structure of the human 48S initiation complex in open state (h48S AUG open) Deposited 2022-01-03 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric
Chain r 1–315（315 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Hepes, pH 7.5, 95 mM KOAc, 3.75 mM Mg(OAc)2, 1 mM ATP, 0.5 mM GTP, 0.25 mM spermidine, 2 mM DTT, 0.4 U/uL RiboLock RNase inhibitor
cryo-EM vitrification conditions Cryogen ETHANE；Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid.
Resolution 4.70 Å
7QP7 Structure of the human 48S initiation complex in closed state (h48S AUG closed) Deposited 2022-01-03 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 51-meric
Chain r 1–315（315 aa）
Not recorded ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Hepes, pH 7.5, 95 mM KOAc, 3.75 mM Mg(OAc)2, 1 mM ATP, 0.5 mM GTP, 0.25 mM spermidine, 2 mM DTT, 0.4 U/uL RiboLock RNase inhibitor
cryo-EM vitrification conditions Cryogen ETHANE；Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid.
Resolution 3.70 Å
7SYR Structure of the wt IRES eIF2-containing 48S initiation complex, closed conformation. Structure 12(wt). Deposited 2021-11-25 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 36 PDB declaration: 39-meric
Chain j 1–315（315 aa）
Not recorded ZN ZINC ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；4 second blot time, force 3
Resolution 3.60 Å
7SYS Structure of the delta dII IRES eIF2-containing 48S initiation complex, closed conformation. Structure 12(delta dII). Deposited 2021-11-25 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 36 PDB declaration: 39-meric
Chain j 1–315（315 aa）
Not recorded ZN ZINC ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；4 second blot time, force 3
Resolution 3.50 Å
8OZ0 Structure of a human 48S translation initiation complex with eIF4F and eIF4A Deposited 2023-05-06 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric
Chain D 1–315（315 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 89 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
8PJ1 Structure of human 48S translation initiation complex in open codon scanning state (48S-1) Deposited 2023-06-22 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric
Chain r 1–315（315 aa）
Not recorded MG MAGNESIUM ION × 90 ZN ZINC ION × 3 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MET METHIONINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.40 Å
8PJ2 Structure of human 48S translation initiation complex in AUG recognition state after eIF5-induced GTP hydrolysis by eIF2 (48S-2) Deposited 2023-06-22 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 46 PDB declaration: 49-meric
Chain r 1–315（315 aa）
Not recorded MG MAGNESIUM ION × 87 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.40 Å
8PJ3 Structure of human 48S translation initiation complex upon transfer of initiator tRNA to eIF5B (48S-3) Deposited 2023-06-22 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric
Chain r 1–315（315 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1 MG MAGNESIUM ION × 89 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.70 Å
8PJ4 Structure of human 48S translation initiation complex after eIF5 release (48S-4) Deposited 2023-06-22 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric
Chain r 1–315（315 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1 MG MAGNESIUM ION × 89 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.20 Å
8PPL MERS-CoV Nsp1 bound to the human 43S pre-initiation complex Deposited 2023-07-07 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 52-meric
Chain Ir 1–315（315 aa）
Not recorded ZN ZINC ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 116 MET METHIONINE × 1 UNX UNKNOWN LIGAND × 129 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 2.65 Å
8QZZ Crystal structure of human eIF2 alpha-gamma complexed with PPP1R15A_420-452 Deposited 2023-10-30 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric
Chain B 1–315（315 aa）
Not recorded GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；11-12% PEG 6000, 0.1M Tris-HCl pH8.5 supplemented with amino acids
Resolution 3.35 Å R-free 0.299
9HVD Native human P-eIF2-eIF2B complex Deposited 2024-12-27 Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric
Chain K 1–315（315 aa）
Chain L 1–315（315 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain K 1–315（315 aa）
Chain L 1–315（315 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9HVF Native human PPP1R15B-P-eIF2-eIF2B complex Deposited 2024-12-27 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain B 1–315（315 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
9NB9 Viral protein DP71L in complex with phosphorylated eIF2alpha (NTD) and protein phosphatase 1A (D64A), stabilized by G-actin/DNAseI Deposited 2025-02-13 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain A 2–187（186 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) MN MANGANESE (II) ION × 1 CA CALCIUM ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；3.5 uL volume, -5 blot force, 1.5 blot time
Resolution 3.03 Å
9QC6 Structure of eIF2B decamer bound to (P)eIF2 alpha and Compound A-(S) Deposited 2025-03-04 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: 11-meric
Chain K 1–187（187 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) A1I5O ~{N}-[(1~{S})-7-[3-[[ethanoyl(methyl)amino]methyl]phenyl]-5-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-yl]-2-[[(3~{R},4~{S})-3-fluoranylpiperidin-4-yl]methoxy]-~{N}-methyl-ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å

36 other PDB entries and 38 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name IF2A_HUMAN
Isoform —
PDB entities 6
Chains and sequence ranges Author chain K； PDBConstruct 1–315； UniProt 1–315 Author chain L； PDBConstruct 1–315； UniProt 1–315

Eukaryotic translation initiation factor 2 subunit 2

Homo sapiens

UniProt P20042

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain M； UniProt 1–333 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 3 × 1 （P41091） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
28ZU human 48S PIC with Kozak mRNA and eIF1A W70A mutant Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 38 PDB declaration: 41-meric
Chain F 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.20 Å
28ZV human 48S PIC with mRNA (non-Kozak) Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 38 PDB declaration: 41-meric
Chain F 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.90 Å
28ZX human 48S PIC with mRNA (Kozak_1) Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain F 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.80 Å
28ZY human 48S PIC with mRNA (Kozak_2) Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain F 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.00 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain M 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6YBV Structure of a human 48S translational initiation complex - eIF2-TC Deposited 2020-03-17 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 3 PDB declaration: pentameric
Chain s 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
6ZMW Structure of a human 48S translational initiation complex Deposited 2020-07-04 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric
Chain s 1–333（333 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 89 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 Å
6ZP4 SARS-CoV-2 Nsp1 bound to a human 43S preinitiation ribosome complex - state 2 Deposited 2020-07-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric
Chain 4 1–333（333 aa）
Not recorded ZN ZINC ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
7A09 Structure of a human ABCE1-bound 43S pre-initiation complex - State III Deposited 2020-08-07 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric
Chain 4 1–333（333 aa）
Not recorded ZN ZINC ION × 4 SF4 IRON/SULFUR CLUSTER × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 3 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MET METHIONINE × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain M 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7QP6 Structure of the human 48S initiation complex in open state (h48S AUG open) Deposited 2022-01-03 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric
Chain s 1–333（333 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Hepes, pH 7.5, 95 mM KOAc, 3.75 mM Mg(OAc)2, 1 mM ATP, 0.5 mM GTP, 0.25 mM spermidine, 2 mM DTT, 0.4 U/uL RiboLock RNase inhibitor
cryo-EM vitrification conditions Cryogen ETHANE；Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid.
Resolution 4.70 Å
8OZ0 Structure of a human 48S translation initiation complex with eIF4F and eIF4A Deposited 2023-05-06 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric
Chain U 1–333（333 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 89 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
8PJ1 Structure of human 48S translation initiation complex in open codon scanning state (48S-1) Deposited 2023-06-22 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric
Chain s 1–333（333 aa）
Not recorded MG MAGNESIUM ION × 90 ZN ZINC ION × 3 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MET METHIONINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.40 Å
8PPL MERS-CoV Nsp1 bound to the human 43S pre-initiation complex Deposited 2023-07-07 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 52-meric
Chain Is 1–333（333 aa）
Not recorded ZN ZINC ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 116 MET METHIONINE × 1 UNX UNKNOWN LIGAND × 129 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 2.65 Å
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain M 1–333（333 aa）
Chain N 1–333（333 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9HVF Native human PPP1R15B-P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain C 1–333（333 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å

16 other PDB entries and 16 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name IF2B_HUMAN
Isoform —
PDB entities 7
Chains and sequence ranges Author chain M； PDBConstruct 1–333； UniProt 1–333

Eukaryotic translation initiation factor 2 subunit 3

Homo sapiens

UniProt P41091

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein copy count Chain P； UniProt 1–472 Not recorded Translation initiation factor eIF-2B subunit alpha × 2 （Q14232） Translation initiation factor eIF-2B subunit beta × 2 （P49770） Translation initiation factor eIF-2B subunit gamma × 2 （Q9NR50） Translation initiation factor eIF-2B subunit delta × 2 （Q9UI10） Translation initiation factor eIF-2B subunit epsilon × 2 （Q13144） Eukaryotic translation initiation factor 2 subunit 1 × 2 （P05198） Eukaryotic translation initiation factor 2 subunit 2 × 1 （P20042） ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 4.60 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6K72 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
28ZU human 48S PIC with Kozak mRNA and eIF1A W70A mutant Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 38 PDB declaration: 41-meric
Chain E 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.20 Å
28ZV human 48S PIC with mRNA (non-Kozak) Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 38 PDB declaration: 41-meric
Chain E 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.90 Å
28ZX human 48S PIC with mRNA (Kozak_1) Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain E 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.80 Å
28ZY human 48S PIC with mRNA (Kozak_2) Deposited 2026-03-03 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain E 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.00 Å
6FEC Human cap-dependent 48S pre-initiation complex Deposited 2017-12-31 Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric
Chain S 39–460（422 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Tris HCl, 50 mM KOAc, 2.5 mM MgCl2, 2 mM DTT, 0.25 mM spermidine 0.25 mM GMPPNP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 6.30 Å
6K71 eIF2 - eIF2B complex Deposited 2019-06-05 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain P 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
6O81 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain S 1–472（472 aa）
Chain T 1–472（472 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.21 Å
6O85 Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens Deposited 2019-03-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric
Chain S 1–472（472 aa）
Not recorded C7B 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylamino]cyclohexyl]ethanamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
6YBV Structure of a human 48S translational initiation complex - eIF2-TC Deposited 2020-03-17 Different oligomeric state Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 3 PDB declaration: pentameric
Chain t 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
6ZMW Structure of a human 48S translational initiation complex Deposited 2020-07-04 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric
Chain t 1–472（472 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 89 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 Å
6ZP4 SARS-CoV-2 Nsp1 bound to a human 43S preinitiation ribosome complex - state 2 Deposited 2020-07-08 Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric
Chain Y 1–472（472 aa）
Not recorded ZN ZINC ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
7A09 Structure of a human ABCE1-bound 43S pre-initiation complex - State III Deposited 2020-08-07 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric
Chain Y 1–472（472 aa）
Not recorded ZN ZINC ION × 4 SF4 IRON/SULFUR CLUSTER × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 3 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MET METHIONINE × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
7D43 eIF2B-eIF2(aP), aPg complex Deposited 2020-09-22 Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric
Chain P 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7F66 eIF2B-SFSV NSs-1-eIF2 Deposited 2021-06-24 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric
Chain S 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.76 Å
7F67 eIF2B-SFSV NSs-2-eIF2 Deposited 2021-06-24 Different construct Different mutation/modification Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric
Chain S 1–472（472 aa）
Chain T 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
7QP6 Structure of the human 48S initiation complex in open state (h48S AUG open) Deposited 2022-01-03 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric
Chain t 1–472（472 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Hepes, pH 7.5, 95 mM KOAc, 3.75 mM Mg(OAc)2, 1 mM ATP, 0.5 mM GTP, 0.25 mM spermidine, 2 mM DTT, 0.4 U/uL RiboLock RNase inhibitor
cryo-EM vitrification conditions Cryogen ETHANE；Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid.
Resolution 4.70 Å
7QP7 Structure of the human 48S initiation complex in closed state (h48S AUG closed) Deposited 2022-01-03 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 51-meric
Chain t 1–472（472 aa）
Not recorded ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Hepes, pH 7.5, 95 mM KOAc, 3.75 mM Mg(OAc)2, 1 mM ATP, 0.5 mM GTP, 0.25 mM spermidine, 2 mM DTT, 0.4 U/uL RiboLock RNase inhibitor
cryo-EM vitrification conditions Cryogen ETHANE；Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid.
Resolution 3.70 Å
8OZ0 Structure of a human 48S translation initiation complex with eIF4F and eIF4A Deposited 2023-05-06 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric
Chain E 1–472（472 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 89 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
8PHD Structure of Human Cdc123 bound to domain 3 of eIF2 gamma and ATP Deposited 2023-06-19 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain B 363–472（110 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；20% PEG3350 0.2 M lithium citrate 1 mM ATP 5 mM MgCl2
Resolution 2.08 Å R-free 0.205
8PHD Structure of Human Cdc123 bound to domain 3 of eIF2 gamma and ATP Deposited 2023-06-19 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain D 363–472（110 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；20% PEG3350 0.2 M lithium citrate 1 mM ATP 5 mM MgCl2
Resolution 2.08 Å R-free 0.205
8PHV Structure of Human selenomethionylated Cdc123 bound to domain 3 of eIF2 gamma Deposited 2023-06-20 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain B 363–472（110 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ATP ADENOSINE-5'-TRIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；20% PEG3350, 8% tacsimate
Resolution 1.97 Å R-free 0.222
8PHV Structure of Human selenomethionylated Cdc123 bound to domain 3 of eIF2 gamma Deposited 2023-06-20 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain D 363–472（110 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ATP ADENOSINE-5'-TRIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；20% PEG3350, 8% tacsimate
Resolution 1.97 Å R-free 0.222
8PJ1 Structure of human 48S translation initiation complex in open codon scanning state (48S-1) Deposited 2023-06-22 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric
Chain t 1–472（472 aa）
Not recorded MG MAGNESIUM ION × 90 ZN ZINC ION × 3 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MET METHIONINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.40 Å
8PJ2 Structure of human 48S translation initiation complex in AUG recognition state after eIF5-induced GTP hydrolysis by eIF2 (48S-2) Deposited 2023-06-22 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 46 PDB declaration: 49-meric
Chain t 1–472（472 aa）
Not recorded MG MAGNESIUM ION × 87 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.40 Å
8PJ3 Structure of human 48S translation initiation complex upon transfer of initiator tRNA to eIF5B (48S-3) Deposited 2023-06-22 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric
Chain t 1–472（472 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1 MG MAGNESIUM ION × 89 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.70 Å
8PJ4 Structure of human 48S translation initiation complex after eIF5 release (48S-4) Deposited 2023-06-22 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric
Chain t 1–472（472 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1 MG MAGNESIUM ION × 89 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 3.20 Å
8PPL MERS-CoV Nsp1 bound to the human 43S pre-initiation complex Deposited 2023-07-07 Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 52-meric
Chain It 1–472（472 aa）
Not recorded ZN ZINC ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 116 MET METHIONINE × 1 UNX UNKNOWN LIGAND × 129 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 2.65 Å
8QZZ Crystal structure of human eIF2 alpha-gamma complexed with PPP1R15A_420-452 Deposited 2023-10-30 Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric
Chain A 1–472（472 aa）
Not recorded GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；11-12% PEG 6000, 0.1M Tris-HCl pH8.5 supplemented with amino acids
Resolution 3.35 Å R-free 0.299
9HVE Native human eIF2-eIF2B complex Deposited 2024-12-27 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric
Chain O 1–472（472 aa）
Chain P 1–472（472 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9HVF Native human PPP1R15B-P-eIF2-eIF2B complex Deposited 2024-12-27 Different oligomeric state Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain D 1–472（472 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å

28 other PDB entries and 30 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name IF2G_HUMAN
Isoform —
PDB entities 8
Chains and sequence ranges Author chain P； PDBConstruct 1–472； UniProt 1–472

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 6k72

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6k72
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6k72
Deposition date deposition_date2019-06-05
Structure title titleeIF2(aP) - eIF2B complex
Keywords keywordsTranslation Initiation, TRANSLATION; TRANSLATION
Experimental Method methodELECTRON MICROSCOPY
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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier61.23 Å
Radius of gyration Rg (electron density) rg_electron61.29 Å
Forward intensity I(0) i03009660000.00
Molecular weight molecular_weight465560.0 kDa
Excluded volume excluded_volume585040 ų
Envelope volume envelope_volume925290 ų
Hydration-shell volume shell_volume126130 ų
Envelope diameter envelope_diameter224.1 Å
Shell Rg shell_rg61.61 Å
Envelope Rg envelope_rg61.52 Å
Shape Rg shape_rg61.32 Å
Total Rg total_rg61.16 Å
Total atoms total_atoms32730
Residues n_residues4263
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 Å−1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3
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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax200.8 Å
Rg (real space) rg_real61.51 Å
Rg uncertainty (real space) rg_real_error1.76 Å
I(0) (real space) i0_real3.0100e+09
I(0) uncertainty (real space) i0_real_error5.9200e+07
Rg (reciprocal space) rg_reciprocal60.98 Å
I(0) (reciprocal space) i0_reciprocal3007000000.0000
Solution quality estimate total_estimate0.8357
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary69.5 Å
Skewness Skewness skewness0.503
Kurtosis Kurtosis kurtosis-0.124
Angular range angular_range— – 0.1300 Å−1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha277700000.0000
Real-space data points n_real_points27
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.868; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.988; Smooth: 0.268
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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (8)

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8. Citations (1)

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9. Files and Curves (10)