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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：Q48898 New Search
5PDB entries
9Biological assembly
11chain/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
1R5I Crystal structure of the MAM-MHC complex Deposited 2003-10-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 23–238（216 aa）
Not recorded PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；298 K；potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.60 Å R-free 0.246
1R5I Crystal structure of the MAM-MHC complex Deposited 2003-10-10 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain H 23–238（216 aa）
Not recorded PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；298 K；potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.60 Å R-free 0.246
2ICW Crystal structure of a complete ternary complex between TCR, superantigen, and peptide-MHC class II molecule Deposited 2006-09-13 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain G 26–238（213 aa） Fragment：residues 26-238
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions EVAPORATION；pH 5.6；298 K；13-15% PEG 4000, 5% isopropanol, 0.1 M sodium citrate, 2 mM zinc acetate, pH 5.6, EVAPORATION, temperature 298K
Resolution 2.41 Å R-free 0.288
2ICW Crystal structure of a complete ternary complex between TCR, superantigen, and peptide-MHC class II molecule Deposited 2006-09-13 Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain H 26–238（213 aa） Fragment：residues 26-238
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions EVAPORATION；pH 5.6；298 K；13-15% PEG 4000, 5% isopropanol, 0.1 M sodium citrate, 2 mM zinc acetate, pH 5.6, EVAPORATION, temperature 298K
Resolution 2.41 Å R-free 0.288
2OJE Mycoplasma arthritidis-derived mitogen complexed with class II MHC molecule HLA-DR1/HA complex in the presence of EDTA Deposited 2007-01-12 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 25–238（214 aa） Fragment：residues 25-238
Not recorded PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 7.5；298 K；1.7M potassium sodium phosphate, 0.1M HEPES, 2 mM EDTA, pH 7.5, VAPOR DIFFUSION, temperature 298K
Resolution 3.00 Å R-free 0.261
2OJE Mycoplasma arthritidis-derived mitogen complexed with class II MHC molecule HLA-DR1/HA complex in the presence of EDTA Deposited 2007-01-12 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain H 25–238（214 aa） Fragment：residues 25-238
Not recorded PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 7.5；298 K；1.7M potassium sodium phosphate, 0.1M HEPES, 2 mM EDTA, pH 7.5, VAPOR DIFFUSION, temperature 298K
Resolution 3.00 Å R-free 0.261
2OJE Mycoplasma arthritidis-derived mitogen complexed with class II MHC molecule HLA-DR1/HA complex in the presence of EDTA Deposited 2007-01-12 Assembly 3 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric（16） Consistent with protein count
Chain D 25–238（214 aa） Fragment：residues 25-238
Chain H 25–238（214 aa） Fragment：residues 25-238
Not recorded PO4 PHOSPHATE ION × 8 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 7.5；298 K；1.7M potassium sodium phosphate, 0.1M HEPES, 2 mM EDTA, pH 7.5, VAPOR DIFFUSION, temperature 298K
Resolution 3.00 Å R-free 0.261
3KPH Crystal structure of Mycoplasma arthritidis-derived mitogen Deposited 2009-11-16 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 26–237（212 aa） Fragment：UNP residues 26-239
Chain B 26–237（212 aa） Fragment：UNP residues 26-239
Mutation：K201A Mutation：K201A PO4 PHOSPHATE ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 6.2；293 K；13-15% PEG 3350, 0.2 M NaCl, 5% Ethylene glycol, 5% Glycerol, 0.1 M Potassium/sodium phosphate pH 6.2, VAPOR DIFFUSION, temperature 293K
Resolution 2.80 Å R-free 0.299
8VSJ Engineered peptide-specific binder in complex with HLA-DR1/CLIP Deposited 2024-01-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C 26–149（124 aa）
Mutation：V30C, Q37S, K38I, H39Y, F40L, V41A, Y59D, L72K, L75E, G86D, V88I, D90K, N92G, G93D, delta 94-97, I100V, T110I, I127T, S144C NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.3
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.28 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.