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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：P13920 New Search
3PDB entries
7Biological assembly
25chain/assembly records
Main Difference Dimensions in This Set
Different assembly state Different ligand/ion 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
1B01 TRANSCRIPTIONAL REPRESSOR COPG/DNA COMPLEX Deposited 1999-11-15 Assembly 1 Protein–DNA Homooligomer；Protein × 4 PDB declaration: octameric（8） Consistent with all polymers
Chain A 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain B 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.7；MPD, HEPES, pH 6.70, VAPOR DIFFUSION, HANGING DROP
Resolution 2.56 Å R-free 0.316
1EA4 TRANSCRIPTIONAL REPRESSOR COPG/22bp dsDNA COMPLEX Deposited 2000-11-05 Assembly 1 Protein–DNA Homooligomer；Protein × 20 PDB declaration: 32-meric（32） Consistent with all polymers
Chain A 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain B 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain D 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain E 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain F 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain G 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain H 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain J 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain K 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain L 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；MPD, NACL, NAACO, pH 4.60
Resolution 2.95 Å R-free 0.307
1EA4 TRANSCRIPTIONAL REPRESSOR COPG/22bp dsDNA COMPLEX Deposited 2000-11-05 Assembly 2 Protein–DNA Homooligomer；Protein × 4 PDB declaration: hexameric（6） Consistent with all polymers
Chain D 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain E 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain F 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain G 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；MPD, NACL, NAACO, pH 4.60
Resolution 2.95 Å R-free 0.307
1EA4 TRANSCRIPTIONAL REPRESSOR COPG/22bp dsDNA COMPLEX Deposited 2000-11-05 Assembly 3 Protein–DNA Homooligomer；Protein × 4 PDB declaration: hexameric（6） Consistent with all polymers
Chain H 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain J 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain K 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain L 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；MPD, NACL, NAACO, pH 4.60
Resolution 2.95 Å R-free 0.307
1EA4 TRANSCRIPTIONAL REPRESSOR COPG/22bp dsDNA COMPLEX Deposited 2000-11-05 Assembly 4 Protein–DNA Homooligomer；Protein × 4 PDB declaration: octameric（8） Consistent with all polymers
Chain A 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain B 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；MPD, NACL, NAACO, pH 4.60
Resolution 2.95 Å R-free 0.307
2CPG TRANSCRIPTIONAL REPRESSOR COPG Deposited 1999-11-15 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Chain B 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded CL CHLORIDE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.7；72% MPD, 0.1 M HEPES PH 6.7, 3% BENZAMIDINE
Resolution 1.60 Å R-free 0.277
2CPG TRANSCRIPTIONAL REPRESSOR COPG Deposited 1999-11-15 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–45（45 aa） Fragment：DNA-BINDING PROTEIN
Not recorded CL CHLORIDE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.7；72% MPD, 0.1 M HEPES PH 6.7, 3% BENZAMIDINE
Resolution 1.60 Å R-free 0.277

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.