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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：P21691 New Search
3PDB entries
4Biological assembly
4chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state 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
1Z1A S. cerevisiae Sir1 ORC-interaction domain Deposited 2005-03-03 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 473–611（139 aa） Fragment：ORC-1 interacting domain of Sir1p
Mutation：C593A Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；298 K；sodium acetate, PEG 400, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.50 Å R-free 0.274
1Z1A S. cerevisiae Sir1 ORC-interaction domain Deposited 2005-03-03 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 473–611（139 aa） Fragment：ORC-1 interacting domain of Sir1p
Mutation：C593A Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；298 K；sodium acetate, PEG 400, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.50 Å R-free 0.274
1ZBX Crystal structure of a Orc1p-Sir1p complex Deposited 2005-04-09 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 480–614（135 aa） Fragment：Orc1p interaction domain
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.2；290 K；MES, NaCl, pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 290K
Resolution 2.50 Å R-free 0.260
1ZHI Complex of the S. cerevisiae Orc1 and Sir1 interacting domains Deposited 2005-04-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 480–611（132 aa） Fragment：OIR* domain of Sir1
Mutation：Cys593Ala No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；298 K；Tris, NaCl, Ammonium Sulfate, pH 7.5, temperature 298K, VAPOR DIFFUSION, HANGING DROP
Resolution 2.70 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.