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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：P02976 New Search
11PDB entries
13Biological assembly
104chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion 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
1DEE Structure of S. aureus protein A bound to a human IgM Fab Deposited 1999-11-15 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain G 100–153（54 aa） Fragment：RECOMBINANT DOMAIN D
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；MPEG 5000, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 2.70 Å R-free 0.281
1DEE Structure of S. aureus protein A bound to a human IgM Fab Deposited 1999-11-15 Assembly 3 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain H 100–153（54 aa） Fragment：RECOMBINANT DOMAIN D
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；MPEG 5000, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 2.70 Å R-free 0.281
1FC2 Crystallographic Refinement and Atomic Models of a Human FC Fragment and its Complex with Fragment B of Protein A from Staphylococcus Aureus at 2.9-and 2.8-Angstroms Resolution Deposited 1981-05-21 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 212–269（58 aa）
Not recorded SO4 SULFATE ION × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.80 Å
1H0T An affibody in complex with a target protein: structure and coupled folding Deposited 2002-06-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 213–269（57 aa） Fragment：RESIDUES 213-269
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 5.6；303 K；Pressure 1
Resolution not provided
4Y4Y T=1 capsid structure of SeMV Ndel65CP fused with B-domain of S. aureus protein SpA at the N-terminus (C2 crystal form) Deposited 2015-02-11 Assembly 1 Insufficient information Homooligomer；Protein × 60 PDB declaration: 60-meric（60） Consistent with protein count
Chain A 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain B 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain C 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain D 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain E 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain F 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain G 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain H 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain I 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain J 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain K 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain L 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain M 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain N 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain O 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain P 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain Q 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain R 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain S 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain T 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain U 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain V 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain W 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain X 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain Y 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain Z 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain a 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain b 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain c 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Chain d 158–211（54 aa） Fragment：UNP RESIDUES 158-211, RESIDUES 66-268
Not recorded SO4 SULFATE ION × 12 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；295 K；15-20% PEG 4000, 5% Iso-propanol, 100 mM Sodium citrate
Resolution 3.00 Å R-free 0.200
4Y5Z T=1 capsid structure of SeMV Ndel65CP fused with B-domain of S. aureus protein SpA at the N-terminus (P1 crystal form) Deposited 2015-02-12 Assembly 1 Insufficient information Homooligomer；Protein × 60 PDB declaration: 60-meric（60） Consistent with protein count
Chain 0 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 1 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 2 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 3 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 4 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 5 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 6 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain 7 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain A 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain B 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain C 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain D 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain E 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain F 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain G 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain H 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain I 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain J 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain K 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain L 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain M 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain N 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain O 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain P 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain Q 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain R 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain S 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain T 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain U 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain V 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain W 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain X 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain Y 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain Z 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain a 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain b 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain c 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain d 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain e 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain f 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain g 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain h 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain i 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain j 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain k 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain l 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain m 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain n 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain o 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain p 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain q 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain r 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain s 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain t 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain u 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain v 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain w 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain x 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain y 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Chain z 158–211（54 aa） Fragment：UNP RESIDUES 158-211,UNP RESIDUES 66-268
Not recorded SO4 SULFATE ION × 12 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；295 K；15-25% PEG 400, 0.2M magnesium chloride, 0.1M HEPES
Resolution 2.95 Å R-free 0.249
9BDE Middle Region of Apolipoprotein B 100 bound to Low Density Lipoprotein Receptor Deposited 2024-04-11 Assembly 1 Insufficient information Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain B 278–327（50 aa） Fragment：;residues 27-384 (Uniprot numbering),residues 278-327 (Uniprot numbering),103-151 (Uniprot numbering),residues 440-497 (Uniprot numbering) ;
Chain B 103–151（49 aa） Fragment：;residues 27-384 (Uniprot numbering),residues 278-327 (Uniprot numbering),103-151 (Uniprot numbering),residues 440-497 (Uniprot numbering) ;
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 CA CALCIUM ION × 7 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.18 Å
9HXS CS-ROSETTA Structure of the Z Domain of the IgG-Binding Staphylococcal Protein A Deposited 2025-01-08 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 212–269（58 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6；298 K；Ionic strength (raw mmCIF value) 150；Pressure 1
NMR sample composition 2 mg/mL [U-100% 13C; U-100% 15N] Protein Z, 25 mM MES, 1 mM CaCl2, 93% H2O/7% D2O | 93% H2O/7% D2O
Resolution not provided
9M5D Crystal structure of S. aureus protein A bound to a human single-domain antibody Deposited 2025-03-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 93–153（61 aa）
Chain H 93–153（61 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；25% w/v Polyethylene glycol 3350, 0.2M Magnesium chloride and 0.1M BIS-Tris 5.5
Resolution 3.57 Å R-free 0.271
9M6J Crystal structure of S. aureus protein A bound to a camelid single-domain antibody Deposited 2025-03-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain H 93–153（61 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；2.0 M Ammonium sulfate
Resolution 2.00 Å R-free 0.226
9M6O Crystal structure of S. aureus protein A bound to a camelid single-domain antibody Deposited 2025-03-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain H 93–153（61 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；25% w/v Polyethylene glycol 3350 and 0.1M Citric acid 3.5
Resolution 1.49 Å R-free 0.257
9M6O Crystal structure of S. aureus protein A bound to a camelid single-domain antibody Deposited 2025-03-07 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 93–153（61 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；25% w/v Polyethylene glycol 3350 and 0.1M Citric acid 3.5
Resolution 1.49 Å R-free 0.257
9QBJ Legobody dimer Deposited 2025-03-03 Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain I 295–321（27 aa）
Chain J 295–321（27 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å

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.