SAXSdb — 3fex

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Nuclear cap-binding protein subunit 1

Homo sapiens

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 × 3 PDB declaration: trimeric（3） Consistent with protein copy count	Chain A； UniProt 1–790	Not recorded	Nuclear cap-binding protein subunit 2 × 1 （P52298） Importin subunit alpha-2 × 1 （P52292）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；100 mM KCl, 12% PEG 8000, 100 mM Tris-HCl pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.55 Å R-free 0.292
2	Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 1–790	Not recorded	Nuclear cap-binding protein subunit 2 × 1 （P52298）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；100 mM KCl, 12% PEG 8000, 100 mM Tris-HCl pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.55 Å R-free 0.292

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 3FEX	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1H2T Structure of the human nuclear cap-binding-complex (CBC) in complex with a cap analogue m7GpppG Deposited 2002-08-16	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 20–652（633 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-653,701-790 Chain C 702–790（89 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-653,701-790	Mutation：YES Mutation：YES	GDP GUANOSINE-5'-DIPHOSPHATE × 1 7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；0.25 TO 1 % PEG 4000, 100 MM MES PH6, 75 TO 100 MM MAGNESIUM FORMATE, pH 6.00	Resolution 2.10 Å R-free 0.269
1H2U Structure of the human nuclear cap-binding-complex (CBC) in complex with a cap analogue m7GpppG Deposited 2002-08-16	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 20–652（633 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-652,701-790 Chain A 702–790（89 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-652,701-790	Mutation：YES Mutation：YES	GDP GUANOSINE-5'-DIPHOSPHATE × 1 7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；0.25 TO 1 % PEG 4000, 100 MM MES PH6, 75 TO 100 MM MAGNESIUM FORMATE, pH 6.00	Resolution 2.40 Å R-free 0.245
1H2U Structure of the human nuclear cap-binding-complex (CBC) in complex with a cap analogue m7GpppG Deposited 2002-08-16	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 20–652（633 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-652,701-790 Chain B 702–790（89 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-652,701-790	Mutation：YES Mutation：YES	GDP GUANOSINE-5'-DIPHOSPHATE × 1 7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；0.25 TO 1 % PEG 4000, 100 MM MES PH6, 75 TO 100 MM MAGNESIUM FORMATE, pH 6.00	Resolution 2.40 Å R-free 0.245
1H2V Structure of the human nuclear cap-binding-complex (CBC) Deposited 2002-08-16	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 20–790（771 aa） Fragment：MIF4G DOMAIN, RESIDUES 20-790	Mutation：YES	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；10 % PEG6000, 100 MM MES PH6, pH 6.00	Resolution 2.00 Å R-free 0.247
1H6K nuclear Cap Binding Complex Deposited 2001-06-18	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 20–670（651 aa） Fragment：MIF4G DOMAIN Chain A 685–790（106 aa） Fragment：MIF4G DOMAIN	Mutation：YES Mutation：YES	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；SEE REFERENCES, pH 7.50	Resolution 2.00 Å R-free 0.234
1H6K nuclear Cap Binding Complex Deposited 2001-06-18	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 20–670（651 aa） Fragment：MIF4G DOMAIN Chain B 685–790（106 aa） Fragment：MIF4G DOMAIN	Mutation：YES Mutation：YES	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；SEE REFERENCES, pH 7.50	Resolution 2.00 Å R-free 0.234
1H6K nuclear Cap Binding Complex Deposited 2001-06-18	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 20–670（651 aa） Fragment：MIF4G DOMAIN Chain C 685–790（106 aa） Fragment：MIF4G DOMAIN	Mutation：YES Mutation：YES	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；SEE REFERENCES, pH 7.50	Resolution 2.00 Å R-free 0.234
1N52 Cap Binding Complex Deposited 2002-11-04	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–790（790 aa）	Not recorded	MG MAGNESIUM ION × 1 PG4 TETRAETHYLENE GLYCOL × 1 GOL GLYCEROL × 16 GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.25；298 K；PEG 400, magnesium chloride, Tris, Glycine, Ethylene Glycol , pH 7.25, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.11 Å R-free 0.246
1N54 Cap Binding Complex m7GpppG free Deposited 2002-11-04	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–790（790 aa）	Not recorded	GOL GLYCEROL × 7	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.25；298 K；Peg 400, Magnesium chloride, glycerol, Tris, glycine, ethylene glycol, pH 7.25, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.72 Å R-free 0.282
3FEY Crystal structure of the CBC-importin alpha complex. Deposited 2008-12-01	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 1–790（790 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；291 K；100 mM MES, pH 6.0, and 8% PEG 4000 , VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.20 Å R-free 0.238
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain D 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain G 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain J 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 5 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain M 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 6 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain P 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 7 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain S 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 8 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain V 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain F 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain I 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
6D0Y X-ray Crystal Structure of PGC-1beta C-terminus bound to the CBP80-CBP20 Cap Binding Complex Deposited 2018-04-11	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 24–790（767 aa）	Not recorded	MG MAGNESIUM ION × 1 GTA P1-7-METHYLGUANOSINE-P3-ADENOSINE-5',5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；0.2 M magnesium chloride, 0.1 M Tris (pH 7.0), 10% [w/v] polyethylene glycol 8000	Resolution 2.68 Å R-free 0.240
7ABG Human pre-Bact-1 spliceosome Deposited 2020-09-07	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 58-meric	Chain A5 1–790（790 aa）	Not recorded	IHP INOSITOL HEXAKISPHOSPHATE × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.9 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.80 Å
8BY6 Structure of the human nuclear cap-binding complex bound to NCBP3(560-620) and cap-analogue m7GpppG Deposited 2022-12-12	Different construct 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 20–790（771 aa）	Not recorded	GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.19 Å
8PMP Structure of the human nuclear cap-binding complex bound to ARS2[147-871] and m7GTP Deposited 2023-06-29	Different construct 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 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.43 Å
8PNT Structure of the human nuclear cap-binding complex bound to PHAX and m7G-capped RNA Deposited 2023-07-01	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 20–790（771 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.46 Å
8SRR Cryo-EM structure of the CBC-ALYREF complex Deposited 2023-05-06	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 1–790（790 aa）	Not recorded	M7G 7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.22 Å
8SUY Cryo-EM structure of the human cap binding complex (CBC) Deposited 2023-05-14	Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–790（790 aa）	Not recorded	M7G 7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.38 Å
9HFL Cryo-EM structure of the human snRNA export complex comprising CBC-PHAX-CRM1-RanGTP and capped-RNA Deposited 2024-11-18	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–RNA Heteromer；Protein × 6 PDB declaration: heptameric	Chain C 1–790（790 aa）	Not recorded	GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 GTA P1-7-METHYLGUANOSINE-P3-ADENOSINE-5',5'-TRIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.62 Å

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

View Construct and Data Evidence

UniProt name	NCBP1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–790； UniProt 1–790

Nuclear cap-binding protein subunit 2

Homo sapiens

UniProt P52298

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 × 3 PDB declaration: trimeric（3） Consistent with protein copy count	Chain B； UniProt 1–156	Not recorded	Nuclear cap-binding protein subunit 1 × 1 （Q09161） Importin subunit alpha-2 × 1 （P52292）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；100 mM KCl, 12% PEG 8000, 100 mM Tris-HCl pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.55 Å R-free 0.292
2	Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain B； UniProt 1–156	Not recorded	Nuclear cap-binding protein subunit 1 × 1 （Q09161）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；100 mM KCl, 12% PEG 8000, 100 mM Tris-HCl pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.55 Å R-free 0.292

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 3FEX	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1H2T Structure of the human nuclear cap-binding-complex (CBC) in complex with a cap analogue m7GpppG Deposited 2002-08-16	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain Z 1–156（156 aa）	Not recorded	GDP GUANOSINE-5'-DIPHOSPHATE × 1 7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；0.25 TO 1 % PEG 4000, 100 MM MES PH6, 75 TO 100 MM MAGNESIUM FORMATE, pH 6.00	Resolution 2.10 Å R-free 0.269
1H2U Structure of the human nuclear cap-binding-complex (CBC) in complex with a cap analogue m7GpppG Deposited 2002-08-16	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain X 1–156（156 aa）	Not recorded	GDP GUANOSINE-5'-DIPHOSPHATE × 1 7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；0.25 TO 1 % PEG 4000, 100 MM MES PH6, 75 TO 100 MM MAGNESIUM FORMATE, pH 6.00	Resolution 2.40 Å R-free 0.245
1H2U Structure of the human nuclear cap-binding-complex (CBC) in complex with a cap analogue m7GpppG Deposited 2002-08-16	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain Y 1–156（156 aa）	Not recorded	GDP GUANOSINE-5'-DIPHOSPHATE × 1 7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；0.25 TO 1 % PEG 4000, 100 MM MES PH6, 75 TO 100 MM MAGNESIUM FORMATE, pH 6.00	Resolution 2.40 Å R-free 0.245
1H2V Structure of the human nuclear cap-binding-complex (CBC) Deposited 2002-08-16	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain Z 1–156（156 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；10 % PEG6000, 100 MM MES PH6, pH 6.00	Resolution 2.00 Å R-free 0.247
1H6K nuclear Cap Binding Complex Deposited 2001-06-18	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain X 22–77（56 aa） Fragment：RNP DOMAIN Chain X 79–120（42 aa） Fragment：RNP DOMAIN	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；SEE REFERENCES, pH 7.50	Resolution 2.00 Å R-free 0.234
1H6K nuclear Cap Binding Complex Deposited 2001-06-18	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain Y 22–77（56 aa） Fragment：RNP DOMAIN Chain Y 79–120（42 aa） Fragment：RNP DOMAIN	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；SEE REFERENCES, pH 7.50	Resolution 2.00 Å R-free 0.234
1H6K nuclear Cap Binding Complex Deposited 2001-06-18	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain Z 22–77（56 aa） Fragment：RNP DOMAIN Chain Z 79–120（42 aa） Fragment：RNP DOMAIN	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；SEE REFERENCES, pH 7.50	Resolution 2.00 Å R-free 0.234
1N52 Cap Binding Complex Deposited 2002-11-04	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 1–156（156 aa）	Not recorded	MG MAGNESIUM ION × 1 PG4 TETRAETHYLENE GLYCOL × 1 GOL GLYCEROL × 16 GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.25；298 K；PEG 400, magnesium chloride, Tris, Glycine, Ethylene Glycol , pH 7.25, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.11 Å R-free 0.246
1N54 Cap Binding Complex m7GpppG free Deposited 2002-11-04	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 1–156（156 aa）	Not recorded	GOL GLYCEROL × 7	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.25；298 K；Peg 400, Magnesium chloride, glycerol, Tris, glycine, ethylene glycol, pH 7.25, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.72 Å R-free 0.282
3FEY Crystal structure of the CBC-importin alpha complex. Deposited 2008-12-01	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 1–156（156 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；291 K；100 mM MES, pH 6.0, and 8% PEG 4000 , VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.20 Å R-free 0.238
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain E 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain H 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain K 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 5 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain N 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 6 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain Q 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 7 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain T 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OO6 Complex of human nuclear cap-binding complex with ARS2 C-terminal peptide Deposited 2017-08-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 8 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain W 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；CBC was mixed with an access of ARS2(827-871) in the presence of 1 mM m7GTP and subjected to gel filtration (120 mM NaCl, 5 mM beta-mercaptoethanol, 20 mM HEPES pH 7.8). The complex was concentrated to 8 mg/ml. Crystals were obtained in mother liquor containing 0.1 M sodium acetate pH 5, 8% (v/v) MPD and 0.1 M guanidine hydrochloride at 20 C.	Resolution 2.80 Å R-free 0.268
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain D 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain G 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
5OOB COMPLEX OF HUMAN NUCLEAR CAP-BINDING COMPLEX WITH M7GTP AND NELF-E C-TERMINAL PEPTIDE Deposited 2017-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain J 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；293 K；6 mg/ml of CBC were mixed with 500 microM m7GTP and 500 microM NELF-E peptide in 120 mM NaCl, 1 mM tris(2-carboxyethyl)phosphine, 20 mM HEPES pH 7.8. Crystals grew at 20 C in mother liquor containing 0.2 M lithium citrate and 20% (w/v) PEG 3350.	Resolution 2.79 Å R-free 0.229
6D0Y X-ray Crystal Structure of PGC-1beta C-terminus bound to the CBP80-CBP20 Cap Binding Complex Deposited 2018-04-11	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 1–156（156 aa）	Not recorded	MG MAGNESIUM ION × 1 GTA P1-7-METHYLGUANOSINE-P3-ADENOSINE-5',5'-TRIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；0.2 M magnesium chloride, 0.1 M Tris (pH 7.0), 10% [w/v] polyethylene glycol 8000	Resolution 2.68 Å R-free 0.240
7ABG Human pre-Bact-1 spliceosome Deposited 2020-09-07	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 58-meric	Chain A1 1–156（156 aa）	Not recorded	IHP INOSITOL HEXAKISPHOSPHATE × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.9 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.80 Å
8BY6 Structure of the human nuclear cap-binding complex bound to NCBP3(560-620) and cap-analogue m7GpppG Deposited 2022-12-12	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 1–156（156 aa）	Not recorded	GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.19 Å
8PMP Structure of the human nuclear cap-binding complex bound to ARS2[147-871] and m7GTP Deposited 2023-06-29	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 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.43 Å
8PNT Structure of the human nuclear cap-binding complex bound to PHAX and m7G-capped RNA Deposited 2023-07-01	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain B 1–156（156 aa）	Not recorded	MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.46 Å
8SRR Cryo-EM structure of the CBC-ALYREF complex Deposited 2023-05-06	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 1–156（156 aa）	Not recorded	M7G 7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.22 Å
8SUY Cryo-EM structure of the human cap binding complex (CBC) Deposited 2023-05-14	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 1–156（156 aa）	Not recorded	M7G 7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.38 Å
9HFL Cryo-EM structure of the human snRNA export complex comprising CBC-PHAX-CRM1-RanGTP and capped-RNA Deposited 2024-11-18	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–RNA Heteromer；Protein × 6 PDB declaration: heptameric	Chain D 1–156（156 aa）	Not recorded	GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 GTA P1-7-METHYLGUANOSINE-P3-ADENOSINE-5',5'-TRIPHOSPHATE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.62 Å

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

View Construct and Data Evidence

UniProt name	NCBP2_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–156； UniProt 1–156

Importin subunit alpha-2

Homo sapiens

UniProt P52292

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 × 3 PDB declaration: trimeric（3） Consistent with protein copy count	Chain C； UniProt 70–529	Not recorded	Nuclear cap-binding protein subunit 1 × 1 （Q09161） Nuclear cap-binding protein subunit 2 × 1 （P52298）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；100 mM KCl, 12% PEG 8000, 100 mM Tris-HCl pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.55 Å R-free 0.292
3	Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count	Chain C； UniProt 70–529	Not recorded	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；100 mM KCl, 12% PEG 8000, 100 mM Tris-HCl pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.55 Å R-free 0.292

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 3FEX	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1EFX STRUCTURE OF A COMPLEX BETWEEN THE HUMAN NATURAL KILLER CELL RECEPTOR KIR2DL2 AND A CLASS I MHC LIGAND HLA-CW3 Deposited 2000-02-10	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain C 204–212（9 aa） Fragment：RESIDUES 204-212	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；298 K；PEG 20000, calcium chloride, sodium cacodylate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 3.00 Å R-free 0.294
1QGK STRUCTURE OF IMPORTIN BETA BOUND TO THE IBB DOMAIN OF IMPORTIN ALPHA Deposited 1999-04-29	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 11–54（44 aa） Fragment：IBB DOMAIN	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；pH 6.5	Resolution 2.50 Å R-free 0.273
1QGR STRUCTURE OF IMPORTIN BETA BOUND TO THE IBB DOMAIN OF IMPORTIN ALPHA (II CRYSTAL FORM, GROWN AT LOW PH) Deposited 1999-05-04	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 28–54（27 aa） Fragment：IBB DOMAIN	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 3.9；pH 3.9	Resolution 2.30 Å R-free 0.285
3FEY Crystal structure of the CBC-importin alpha complex. Deposited 2008-12-01	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 70–529（460 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；291 K；100 mM MES, pH 6.0, and 8% PEG 4000 , VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.20 Å R-free 0.238
3WPT Crystal structure of closed dimer of human importin-alpha1 (Rch1) Deposited 2014-01-17	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 75–497（423 aa） Fragment：UNP residues 75-497	Not recorded	PEG DI(HYDROXYETHYL)ETHER × 11	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；293 K；50MM MES, 100MM AMMONIUM SULFATE, 10MM MGCL, 15-20%(w/v) PEG8000, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.63 Å R-free 0.216
3WPT Crystal structure of closed dimer of human importin-alpha1 (Rch1) Deposited 2014-01-17	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 75–497（423 aa） Fragment：UNP residues 75-497	Not recorded	PEG DI(HYDROXYETHYL)ETHER × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；293 K；50MM MES, 100MM AMMONIUM SULFATE, 10MM MGCL, 15-20%(w/v) PEG8000, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.63 Å R-free 0.216
4E4V The crystal structure of the dimeric human importin alpha 1 at 2.5 angstrom resolution. Deposited 2012-03-13	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 70–529（460 aa） Fragment：Importin alpha 1 lacking IBB domain (UNP residues 70-529)	Mutation：K486R	GOL GLYCEROL × 8 DTT 2,3-DIHYDROXY-1,4-DITHIOBUTANE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.4；298 K；0.5 CITRATE PH 5.4 10 MM DTT, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.53 Å R-free 0.203
4E4V The crystal structure of the dimeric human importin alpha 1 at 2.5 angstrom resolution. Deposited 2012-03-13	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 70–529（460 aa） Fragment：Importin alpha 1 lacking IBB domain (UNP residues 70-529)	Mutation：K486R	GOL GLYCEROL × 5 DTT 2,3-DIHYDROXY-1,4-DITHIOBUTANE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.4；298 K；0.5 CITRATE PH 5.4 10 MM DTT, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.53 Å R-free 0.203
4WV6 Heterodimer of Importin alpha 1 with nuclear localization signal of TAF8 Deposited 2014-11-04	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 60–529（470 aa） Fragment：UNP residues 60-529	Not recorded	EDO 1,2-ETHANEDIOL × 12	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.1；281.15 K；HEPES-NaOH, polyethylene glycole 3350, L-proline	Resolution 1.75 Å R-free 0.180
5H43 Structural and mechanistical studies of the nuclear import by Importin-alpha Deposited 2016-10-28	Different construct Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 70–497（428 aa） Fragment：UNP residues 70-497	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；3%(v/v) Tacsimate pH5.0, 0.1M Sodium citrate tribasic dehydrate pH5.6, 16%(w/v) PEG 3350	Resolution 2.30 Å R-free 0.243
7CRU hnRNPK NLS in complex with Importin alpha 1 (KPNA2) Deposited 2020-08-14	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 73–529（457 aa）	Not recorded	ACT ACETATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；293 K；0.1 M Ammonium Acetate, 0.1 M Bis-Tris pH 5.5, 17% w/v PEG 10000	Resolution 2.80 Å R-free 0.240
7CRU hnRNPK NLS in complex with Importin alpha 1 (KPNA2) Deposited 2020-08-14	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 73–529（457 aa）	Not recorded	ACT ACETATE ION × 4 GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；293 K；0.1 M Ammonium Acetate, 0.1 M Bis-Tris pH 5.5, 17% w/v PEG 10000	Resolution 2.80 Å R-free 0.240
7N8J Human importin alpha 1 in complex with Bimax2 peptide Deposited 2021-06-15	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 76–529（454 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；296 K；0.4 M Ammonium phosphate monobasic	Resolution 3.20 Å R-free 0.244
7N9H Structure of the mammalian importin a1 bound to the TDP-43 NLS Deposited 2021-06-17	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 70–497（428 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.6；293 K；0.5M sodium citrate, 10 mM mercaptoethanol	Resolution 2.20 Å R-free 0.215
8FZK Dimeric human importin alpha subunit Deposited 2023-01-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 71–529（459 aa） Chain B 71–529（459 aa）	Not recorded	MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；14% PEG 8000, 0.2M Magnesium chloride, 0.1M MES	Resolution 2.10 Å R-free 0.247
8FZK Dimeric human importin alpha subunit Deposited 2023-01-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 71–529（459 aa） Chain D 71–529（459 aa）	Not recorded	MG MAGNESIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；14% PEG 8000, 0.2M Magnesium chloride, 0.1M MES	Resolution 2.10 Å R-free 0.247
8GCN CRYO-EM STRUCTURE OF IMPORTIN ALPHA1/BETA HETERODIMER Deposited 2023-03-02	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 11–53（43 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.95 Å
9B4Y Cryo-EM structure of importin alpha-1/beta bound to TDP-43 Deposited 2024-03-21	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 11–53（43 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.74 Å
9BFC Cryo-EM structure of importin alpha-1/beta bound to FG repeats Deposited 2024-04-17	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: hexameric	Chain I 1–53（53 aa）	Not recorded	PHE PHENYLALANINE × 2 GLY GLYCINE × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.20 Å
9N86 Cryo-EM structure of human importin beta:importin alpha (IBB) complex Deposited 2025-02-07	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 1–53（53 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.30 Å

16 other PDB entries and 20 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	IMA2_HUMAN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 2–461； UniProt 70–529

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	3fex
Deposition date deposition_date	2008-12-01
Structure title title	Crystal structure of the CBC-importin alpha complex.
Keywords keywords	;Cap binding complex, importin alpha, nuclear transport, Coiled coil, mRNA transport, Nucleus, Phosphoprotein, RNA-binding, Acetylation, Cytoplasm, Host-virus interaction, TRANSLATION, PROTEIN TRANSPORT ;; TRANSLATION, PROTEIN TRANSPORT
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	43.11 Å
Radius of gyration Rg (electron density) rg_electron	43.35 Å
Forward intensity I(0) i0	291294000.00
Molecular weight molecular_weight	142790.0 kDa
Excluded volume excluded_volume	180220 Å³
Envelope volume envelope_volume	243900 Å³
Hydration-shell volume shell_volume	50100 Å³
Envelope diameter envelope_diameter	160.0 Å
Shell Rg shell_rg	45.19 Å
Envelope Rg envelope_rg	42.55 Å
Shape Rg shape_rg	43.34 Å
Total Rg total_rg	43.50 Å
Total atoms total_atoms	10051
Residues n_residues	1259
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	157.3 Å
Rg (real space) rg_real	43.50 Å
Rg uncertainty (real space) rg_real_error	1.98 Å
I(0) (real space) i0_real	2.9130e+08
I(0) uncertainty (real space) i0_real_error	5.6960e+06
Rg (reciprocal space) rg_reciprocal	43.11 Å
I(0) (reciprocal space) i0_reciprocal	291200000.0000
Solution quality estimate total_estimate	0.8212
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	42.5 Å
Skewness Skewness skewness	0.583
Kurtosis Kurtosis kurtosis	-0.100
Angular range angular_range	— – 0.1850 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	29060000.0000
Real-space data points n_real_points	38
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.700; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.796; Smooth: 0.776

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Description description	Nuclear cap-binding protein subunit 1
Molecular weight formula_weight	91960.3 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	10051

MSRRRHSDENDGGQPHKRRKTSDANETEDHLESLICKVGEKSACSLESNLEGLAGVLEADLPNYKSKILRLLCTVARLLPEKLTIYTTLVGLLNARNYNFGGEFVEAMIRQLKESLKANNYNEAVYLVRFLSDLVNCHVIAAPSMVAMFENFVSVTQEEDVPQVRRDWYVYAFLSSLPWVGKELYEKKDAEMDRIFANTESYLKRRQKTHVPMLQVWTADKPHPQEEYLDCLWAQIQKLKKDRWQERHILRPYLAFDSILCEALQHNLPPFTPPPHTEDSVYPMPRVIFRMFDYTDDPEGPVMPGSHSVERFVIEENLHCIIKSHWKERKTCAAQLVSYPGKNKIPLNYHIVEVIFAELFQLPAPPHIDVMYTTLLIELCKLQPGSLPQVLAQATEMLYMRLDTMNTTCVDRFINWFSHHLSNFQFRWSWEDWSDCLSQDPESPKPKFVREVLEKCMRLSYHQRILDIVPPTFSALCPANPTCIYKYGDESSNSLPGHSVALCLAVAFKSKATNDEIFSILKDVPNPNQDDDDDEGFSFNPLKIEVFVQTLLHLAAKSFSHSFSALAKFHEVFKTLAESDEGKLHVLRVMFEVWRNHPQMIAVLVDKMIRTQIVDCAAVANWIFSSELSRDFTRLFVWEILHSTIRKMNKHVLKIQKELEEAKEKLARQHKRRSDDDDRSSDRKDGVLEEQIERLQEKVESAQSEQKNLFLVIFQRFIMILTEHLVRCETDGTSVLTPWYKNCIERLQQIFLQHHQIIQQYMVTLENLLFTAELDPHILAVFQQFCALQA

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Spodoptera frugiperda

Entity 2 Entity 2 polymer

Description description	Nuclear cap-binding protein subunit 2
Molecular weight formula_weight	18028.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MSGGLLKALRSDSYVELSQYRDQHFRGDNEEQEKLLKKSCTLYVGNLSFYTTEEQIYELFSKSGDIKKIIMGLDKMKKTACGFCFVEYYSRADAENAMRYINGTRLDDRIIRTDWDAGFKEGRQYGRGRSGGQVRDEYRQDYDAGRGGYGKLAQNQ

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Spodoptera frugiperda

Entity 3 Entity 3 polymer

Description description	Importin subunit alpha-2
Molecular weight formula_weight	50779.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MNQGTVNWSVDDIVKGINSSNVENQLQATQAARKLLSREKQPPIDNIIRAGLIPKFVSFLGRTDCSPIQFESAWALTNIASGTSEQTKAVVDGGAIPAFISLLASPHAHISEQAVWALGNIAGDGSVFRDLVIKYGAVDPLLALLAVPDMSSLACGYLRNLTWTLSNLCRNKNPAPPIDAVEQILPTLVRLLHHDDPEVLADTCWAISYLTDGPNERIGMVVKTGVVPQLVKLLGASELPIVTPALRAIGNIVTGTDEQTQVVIDAGALAVFPSLLTNPKTNIQKEATWTMSNITAGRQDQIQQVVNHGLVPFLVSVLSKADFKTQKEAVWAVTNYTSGGTVEQIVYLVHCGIIEPLMNLLTAKDTKIILVILDAISNIFQAAEKLGETEKLSIMIEECGGLDKIEALQNHENESVYKASLSLIEKYFSVEEEEDQNVVPETTSEGYTFQVQDGAPGTFNFHHHHHH

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli

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7. Fold Classification (SCOP + CATH) 5 domains

CATH v4.4 (5 domains)

Domain ID domain_id	3fexA01
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	180 —

Domain ID domain_id	3fexA02
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	180 —

Domain ID domain_id	3fexA03
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	180 —

Domain ID domain_id	3fexB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	330 — RRM (RNA recognition motif) domain

Domain ID domain_id	3fexC00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	10 — Leucine-rich Repeat Variant
Homologous superfamily homologous superfamily	10 — Leucine-rich Repeat Variant

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8. Citations (1)

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Unit-cell length a length_a	83.508 Å
Unit-cell length b length_b	102.051 Å
Unit-cell length c length_c	107.878 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	108.82 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	3.549 Å
Low-resolution limit resolution_low	15.652 Å
R factor r_factor	0.2212
R_work r_work	0.2173
R_free r_free	0.2924

fit	/app/data/saxs_computation/fe/3fex/3fex.fit
pddf	/app/data/pr_computation/fe/3fex/3fex.pr.out
profile	/app/data/saxs_computation/fe/3fex/3fex.dat

Crystal structure of the CBC-importin alpha complex.

1. Protein Identity and Related Structures Protein Identity & Related Structures

Nuclear cap-binding protein subunit 1

State in the Current Structure

Other States of the Same Protein in the Database

Nuclear cap-binding protein subunit 2

State in the Current Structure

Other States of the Same Protein in the Database

Importin subunit alpha-2

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 polymer

Polymer Polymer

来源 Source

Entity 3 Entity 3 polymer

Polymer Polymer

来源 Source

7. Fold Classification (SCOP + CATH) 5 domains

CATH v4.4 (5 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)