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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：P02977 New Search
2PDB entries
3Biological assembly
5chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different experimental method 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
2KK9 Anti-group A streptococcal vaccine epitope: structure, stability and its ability to interact with HLA class II molecules Deposited 2009-06-16 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 300–354（55 aa） Fragment：UNP residues 300-354
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 3.7；295 K；Pressure ambient
NMR sample composition 5.4 mg/mL, trifluoroethanol/water 30/70% | trifluoroethanol/water 30/70%
Resolution not provided
9MMU M5 protein with Factor H 6-7 domain Deposited 2024-12-20 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 94–175（82 aa）
Chain B 94–175（82 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；291 K；PEG 6000, Ethylene glycol, Sodium Chloride
Resolution 2.25 Å R-free 0.287
9MMU M5 protein with Factor H 6-7 domain Deposited 2024-12-20 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain E 94–175（82 aa）
Chain F 94–175（82 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；291 K；PEG 6000, Ethylene glycol, Sodium Chloride
Resolution 2.25 Å R-free 0.287

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.