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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：O95931 New Search
8PDB entries
11Biological assembly
13chain/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
2K1B Solution NMR structure of the chromo domain of the chromobox protein homolog 7 Deposited 2008-02-25 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 7–62（56 aa） Fragment：Chromo domain: Residues 7-62
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.4；298 K；Ionic strength (raw mmCIF value) 300；Pressure ambient
NMR sample composition 10 mM phosphate, 300 mM sodium chloride, 2 mM DTT, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
2L1B Solution NMR structure of the chromobox protein Cbx7 with H3K27me3 Deposited 2010-07-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 8–62（55 aa） Fragment：UNP Residues 7-62
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.4；298 K；Ionic strength (raw mmCIF value) 300；Pressure ambient
NMR sample composition 0.5 mM [U-13C; U-15N] protein, 2.7 mM peptide, 10 mM sodium phosphate, 300 mM sodium chloride, 0.5 mM PMSF, 0.5 mM TCEP, 1 mM Benzamidine, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
3GS2 Ring1B C-terminal domain/Cbx7 Cbox Complex Deposited 2009-03-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 219–248（30 aa） Fragment：Cbox domain, residues 219-248
Chain D 219–248（30 aa） Fragment：Cbox domain, residues 219-248
Not recorded SO4 SULFATE ION × 2 ZN ZINC ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；25% PEG MME 550, 0.1 M MES, 0.01 M zinc sulfate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K
Resolution 1.70 Å R-free 0.243
3GS2 Ring1B C-terminal domain/Cbx7 Cbox Complex Deposited 2009-03-26 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 219–248（30 aa） Fragment：Cbox domain, residues 219-248
Not recorded SO4 SULFATE ION × 2 ZN ZINC ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；25% PEG MME 550, 0.1 M MES, 0.01 M zinc sulfate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K
Resolution 1.70 Å R-free 0.243
3GS2 Ring1B C-terminal domain/Cbx7 Cbox Complex Deposited 2009-03-26 Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 219–248（30 aa） Fragment：Cbox domain, residues 219-248
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；25% PEG MME 550, 0.1 M MES, 0.01 M zinc sulfate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K
Resolution 1.70 Å R-free 0.243
4MN3 Chromodomain antagonists that target the polycomb-group methyllysine reader protein Chromobox homolog 7 (CBX7) Deposited 2013-09-09 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 7–62（56 aa） Fragment：protein
Not recorded EDO 1,2-ETHANEDIOL × 3 MG MAGNESIUM ION × 1 P33 3,6,9,12,15,18-HEXAOXAICOSANE-1,20-DIOL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；298 K；40% ethylene glycol, 0.1M HEPES pH 7.5, 5% PEG 3000, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Resolution 1.54 Å R-free 0.213
5EPJ Crystal Structure of chromodomain of CBX7 in complex with inhibitor UNC3866 Deposited 2015-11-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 7–62（56 aa）
Not recorded UNX UNKNOWN LIGAND × 13 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；20% PEG 3350, 0.2 M ammonium formate
Resolution 1.60 Å R-free 0.260
6V2R Crystal Structure of chromodomain of CBX7 mutant V13A in complex with inhibitor UNC3866 Deposited 2019-11-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 7–62（56 aa） Fragment：Chromodomain
Mutation：V13A UNX UNKNOWN LIGAND × 17 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；1.5 M ammonium sulfate, 0.1 M bis-tris propane, pH 7
Resolution 1.60 Å R-free 0.235
8SII Crystal Structure of CBX7 with compound UNC4976 Deposited 2023-04-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 7–62（56 aa） Fragment：chromodomain
Not recorded SO4 SULFATE ION × 2 CA CALCIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；291 K；2.5 M Ammonium Sulfate, 0.1 M BIS-Tris propane PH7.0
Resolution 1.37 Å R-free 0.223
8SII Crystal Structure of CBX7 with compound UNC4976 Deposited 2023-04-16 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 7–62（56 aa） Fragment：chromodomain
Not recorded SO4 SULFATE ION × 2 CL CHLORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；291 K；2.5 M Ammonium Sulfate, 0.1 M BIS-Tris propane PH7.0
Resolution 1.37 Å R-free 0.223
9V9P Cryo-EM structure of the cPRC1-di-nucleosome (CBX7) complex Deposited 2025-06-01 Assembly 1 Protein–DNA Heteromer；Protein × 22 PDB declaration: 24-meric（24） Consistent with all polymers
Chain S 1–251（251 aa）
Chain Y 1–251（251 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.40 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.