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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：Q53284 New Search
1PDB entries
1Biological assembly
4chain/assembly records
Main Difference Dimensions in This Set
No difference found in parsed fields

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
1C4P BETA DOMAIN OF STREPTOKINASE Deposited 1999-09-15 Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 149–285（137 aa） Fragment：BETA DOMAIN
Chain B 149–285（137 aa） Fragment：BETA DOMAIN
Chain C 149–285（137 aa） Fragment：BETA DOMAIN
Chain D 149–285（137 aa） Fragment：BETA DOMAIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.5；pH 5.5
Resolution 2.40 Å R-free 0.304

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.