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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：O31408 New Search
2PDB entries
2Biological assembly
9chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification 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
1B4A STRUCTURE OF THE ARGININE REPRESSOR FROM BACILLUS STEAROTHERMOPHILUS Deposited 1998-12-18 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 2–149（148 aa）
Chain B 2–149（148 aa）
Chain C 2–149（148 aa）
Chain D 2–149（148 aa）
Chain E 2–149（148 aa）
Chain F 2–149（148 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 5；pH 5
Resolution 2.50 Å R-free 0.279
1B4B STRUCTURE OF THE OLIGOMERIZATION DOMAIN OF THE ARGININE REPRESSOR FROM BACILLUS STEAROTHERMOPHILUS Deposited 1998-12-18 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 79–149（71 aa） Fragment：OLIGOMERIZATION DOMAIN, L-ARGININE BINDING DOMAIN
Chain B 79–149（71 aa） Fragment：OLIGOMERIZATION DOMAIN, L-ARGININE BINDING DOMAIN
Chain C 79–149（71 aa） Fragment：OLIGOMERIZATION DOMAIN, L-ARGININE BINDING DOMAIN
Not recorded ARG ARGININE × 6 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；pH 6.5
Resolution 2.20 Å R-free 0.266

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.