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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：P55884 New Search
19PDB entries
19Biological assembly
19chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
2KRB Solution structure of EIF3B-RRM bound to EIF3J peptide Deposited 2009-12-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 184–264（81 aa） Fragment：RRM domain, UNP residues 184-264
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.5；298 K；Ionic strength (raw mmCIF value) 0.1；Pressure AMBIENT
NMR sample composition 0.7 mM [U-100% 13C; U-100% 15N] eIF3b-RRM, 0.85 mM eIF3j peptide, 90% H2O/10% D2O | 90% H2O/10% D2O
NMR sample composition 0.7 mM eIF3b-RRM, 0.85 mM [U-100% 13C; U-100% 15N] eIF3j peptide, 90% H2O/10% D2O | 90% H2O/10% D2O
NMR sample composition 0.7 mM [U-100% 13C; U-100% 15N] eIF3b-RRM, 0.85 mM eIF3j peptide, 100% D2O | 100% D2O
Resolution not provided
2NLW Solution structure of the RRM domain of human eukaryotic initiation factor 3b Deposited 2006-10-20 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 170–274（105 aa） Fragment：RNA Recognition Motif
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.5；298 K；Ionic strength (raw mmCIF value) 300mM；Pressure ambient
NMR sample composition 0.8mM eIF3b-RRM unlabeled, 20mM HEPES, 90% H2O, 10% D2O | 90% H2O/10% D2O
NMR sample composition 0.8mM eIF3b-RRM U-15N, 20mM HEPES, 90% H2O, 10% D2O | 90% H2O/10% D2O
NMR sample composition 0.8mM eIF3b-RRM U-15N,13C, 20mM HEPES, 90% H2O, 10% D2O | 90% H2O/10% D2O
Resolution not provided
5K1H eIF3b relocated to the intersubunit face to interact with eIF1 and below the eIF2 ternary-complex. from the structure of a partial yeast 48S preinitiation complex in closed conformation. Deposited 2016-05-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 170–745（576 aa） Fragment：UNP Residues 170-745
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 6.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.90 Å
6YBT Structure of a human 48S translational initiation complex - eIF3bgi Deposited 2020-03-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain 1 1–814（814 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 6.00 Å
6ZMW Structure of a human 48S translational initiation complex Deposited 2020-07-04 Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric（57） Consistent with all polymers
Chain 1 1–814（814 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
6ZON SARS-CoV-2 Nsp1 bound to a human 43S preinitiation ribosome complex - state 1 Deposited 2020-07-07 Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 48-meric（48） Consistent with all polymers
Chain B 1–814（814 aa）
Not recorded ZN ZINC ION × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
6ZP4 SARS-CoV-2 Nsp1 bound to a human 43S preinitiation ribosome complex - state 2 Deposited 2020-07-08 Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric（54） Consistent with all polymers
Chain B 1–814（814 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
6ZVJ Structure of a human ABCE1-bound 43S pre-initiation complex - State II Deposited 2020-07-24 Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 51-meric（51） Consistent with all polymers
Chain B 180–745（566 aa）
Not recorded ZN ZINC ION × 3 SF4 IRON/SULFUR CLUSTER × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7A09 Structure of a human ABCE1-bound 43S pre-initiation complex - State III Deposited 2020-08-07 Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 54-meric（54） Consistent with all polymers
Chain B 1–814（814 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
7QP6 Structure of the human 48S initiation complex in open state (h48S AUG open) Deposited 2022-01-03 Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric（53） Consistent with all polymers
Chain 1 1–813（813 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 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 51-meric（51） Consistent with all polymers
Chain 1 1–813（813 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 Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 57-meric（57） Consistent with all polymers
Chain I 1–814（814 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 Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 1 1–814（814 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 Assembly 1 Protein–RNA Heteromer；Protein × 46 PDB declaration: 49-meric（49） Consistent with all polymers
Chain 1 1–814（814 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 Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 1 1–814（814 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 Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 53-meric（53） Consistent with all polymers
Chain 1 1–814（814 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
8PJ5 Structure of human 48S translation initiation complex after eIF2 release prior 60S subunit joining (48S-5) Deposited 2023-06-22 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 51-meric（51） Consistent with all polymers
Chain 1 1–814（814 aa）
Not recorded MG MAGNESIUM ION × 91 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；Manual blotting & plunge-freezing
Resolution 2.90 Å
8PJ6 Structure of human 48S translation initiation complex with initiator tRNA, eIF1A and eIF3 (off-pathway) Deposited 2023-06-22 Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 50-meric（50） Consistent with all polymers
Chain 1 1–814（814 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 2.90 Å
8XXN Cryo-EM structure of the human 43S ribosome with PDCD4 Deposited 2024-01-18 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 50-meric（50） Consistent with all polymers
Chain 3B 1–814（814 aa）
Not recorded MG MAGNESIUM ION × 23 ZN ZINC ION × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.