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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：P31321 New Search
3PDB entries
4Biological assembly
6chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification 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
4DIN Novel Localization and Quaternary Structure of the PKA RI beta Holoenzyme Deposited 2012-01-31 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–381（381 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.3；277 K；1.4 M ammonium sulfate, 0.1M Sodium Acetate pH 5.3, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 3.70 Å R-free 0.293
4F9K Crystal Structure of human cAMP-dependent protein kinase type I-beta regulatory subunit (fragment 11-73), Northeast Structural Genomics Consortium (NESG) Target HR8613A Deposited 2012-05-18 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 11–73（63 aa）
Chain B 11–73（63 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions microbatch under oil；pH 6.5；291 K；Protein solution: 100mM NaCl, 5mM DTT, 0.02% NaN3, 10mM Tris-HCl (pH 7.5) . Reservoir solution:0.2M (NH4)2SO4, 0.1M Na-c, microbatch under oil, temperature 291K
Resolution 2.80 Å R-free 0.324
4F9K Crystal Structure of human cAMP-dependent protein kinase type I-beta regulatory subunit (fragment 11-73), Northeast Structural Genomics Consortium (NESG) Target HR8613A Deposited 2012-05-18 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 11–73（63 aa）
Chain D 11–73（63 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions microbatch under oil；pH 6.5；291 K；Protein solution: 100mM NaCl, 5mM DTT, 0.02% NaN3, 10mM Tris-HCl (pH 7.5) . Reservoir solution:0.2M (NH4)2SO4, 0.1M Na-c, microbatch under oil, temperature 291K
Resolution 2.80 Å R-free 0.324
9O7V Crystal Structure of the RIb:C Heterodimer of PKA Deposited 2025-04-15 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–381（381 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.3；293 K；1.4M ammonium sulfate and 0.1M sodium acetate at pH 5.3.
Resolution 3.70 Å R-free 0.293

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.