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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：O19712 New Search
17PDB entries
28Biological assembly
29chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion 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
5KSU Crystal structure of HLA-DQ2.5-CLIP1 at 2.73 resolution Deposited 2016-07-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 1–198（198 aa） Fragment：UNP residues 1-198
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；PEG 8000, ammonium sulphate, sodium cacodylate, glycerol
Resolution 2.73 Å R-free 0.249
5KSU Crystal structure of HLA-DQ2.5-CLIP1 at 2.73 resolution Deposited 2016-07-10 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain E 1–198（198 aa） Fragment：UNP residues 1-198
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；PEG 8000, ammonium sulphate, sodium cacodylate, glycerol
Resolution 2.73 Å R-free 0.249
5KSV Crystal structure of HLA-DQ2.5-CLIP2 Deposited 2016-07-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 1–198（198 aa） Fragment：UNP residues 1-198
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；291 K；0.1 M BIS-TRIS, pH 5.5, 22% PEG 3350
Resolution 2.19 Å R-free 0.210
6MFF HLA-DQ2-glia-omega1 Deposited 2018-09-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；23% PEG3350 and 0.1 M NaH2PO4, pH 6
Resolution 2.60 Å R-free 0.250
6MFG HLA-DQ2-glia-alpha1 Deposited 2018-09-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain E 1–192（192 aa）
Chain F 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；23% PEG3350 and 0.1 M NaH2PO4, pH 6
Resolution 2.00 Å R-free 0.222
6U3M DQ2-P.fluor-alpha1a Deposited 2019-08-22 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain D 1–192（192 aa）
Not recorded GOL GLYCEROL × 2 PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；18% PEG3350 and 0.15M NH4H2PO4
Resolution 1.90 Å R-free 0.220
6U3M DQ2-P.fluor-alpha1a Deposited 2019-08-22 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded GOL GLYCEROL × 2 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；18% PEG3350 and 0.15M NH4H2PO4
Resolution 1.90 Å R-free 0.220
6U3N LS2.8/3.15 - DQ2-P.fluor-alpha1a complex Deposited 2019-08-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；22% PEG3350, 0.2M Na-K Tartrate, 0.1M MES pH6.5
Resolution 2.80 Å
6U3O JR51 DQ2-p.aeru-alpha2a complex Deposited 2019-08-22 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain F 1–192（192 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；23%PEG3350, 0.01mM Na-Acetate, 0.1 M Tris pH8.0
Resolution 2.74 Å
6U3O JR51 DQ2-p.aeru-alpha2a complex Deposited 2019-08-22 Assembly 2 Other combination Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain D 1–192（192 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；23%PEG3350, 0.01mM Na-Acetate, 0.1 M Tris pH8.0
Resolution 2.74 Å
6XP6 3C11-DQ2-glia-a2 complex Deposited 2020-07-08 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 IPA ISOPROPYL ALCOHOL × 7 CL CHLORIDE ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；10% PEG 4000 20% 2-propanol 0.1M HEPES
Resolution 2.40 Å R-free 0.212
6XP6 3C11-DQ2-glia-a2 complex Deposited 2020-07-08 Assembly 2 Other combination Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain E 1–192（192 aa）
Not recorded IPA ISOPROPYL ALCOHOL × 5 CL CHLORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；10% PEG 4000 20% 2-propanol 0.1M HEPES
Resolution 2.40 Å R-free 0.212
7SG0 W316 TCR in complex with HLA-DQ2-omega1 Deposited 2021-10-04 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 EDO 1,2-ETHANEDIOL × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；24% PEG3350, 0.25 M (NH4)2SO4 and 0.1 M Tris/HCl at pH 8.0
Resolution 3.00 Å R-free 0.230
7SG1 XPA5 TCR in complex with HLA-DQ2-alpha1 Deposited 2021-10-04 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 EDO 1,2-ETHANEDIOL × 1 CA CALCIUM ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；Mother liquor: 16-18% PEG3350, 0.12-0.14 M CaOAc, 0.1 M Tris/HCl at pH 8.0, Additives: 2 mM reduced and oxidised Glutathione
Resolution 3.10 Å R-free 0.258
7SG1 XPA5 TCR in complex with HLA-DQ2-alpha1 Deposited 2021-10-04 Assembly 2 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain G 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 EDO 1,2-ETHANEDIOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；Mother liquor: 16-18% PEG3350, 0.12-0.14 M CaOAc, 0.1 M Tris/HCl at pH 8.0, Additives: 2 mM reduced and oxidised Glutathione
Resolution 3.10 Å R-free 0.258
7SG2 XPA5 TCR in complex with HLA-DQ2-omega1 Deposited 2021-10-04 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 EDO 1,2-ETHANEDIOL × 1 ACT ACETATE ION × 1 CA CALCIUM ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；Mother liquor: 16-18% PEG3350, 0.12-0.14 M CaOAc, 0.1 M Tris/HCl at pH 8.0, Additives: 2 mM reduced and oxidised Glutathione
Resolution 3.10 Å R-free 0.259
7SG2 XPA5 TCR in complex with HLA-DQ2-omega1 Deposited 2021-10-04 Assembly 2 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain G 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 EDO 1,2-ETHANEDIOL × 2 ACT ACETATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；Mother liquor: 16-18% PEG3350, 0.12-0.14 M CaOAc, 0.1 M Tris/HCl at pH 8.0, Additives: 2 mM reduced and oxidised Glutathione
Resolution 3.10 Å R-free 0.259
8W83 HLA-DQ2.5-alpha1 gliadin peptide in complex with DQN0344AE02 Deposited 2023-08-31 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；294 K；0.1 M HEPES (pH7.5), 25.0 %w/v Polyethylene glycol 1,000, and 20 %v/v Glycerol as cryoprotectant
Resolution 2.82 Å R-free 0.321
8W83 HLA-DQ2.5-alpha1 gliadin peptide in complex with DQN0344AE02 Deposited 2023-08-31 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain H 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；294 K；0.1 M HEPES (pH7.5), 25.0 %w/v Polyethylene glycol 1,000, and 20 %v/v Glycerol as cryoprotectant
Resolution 2.82 Å R-free 0.321
8W83 HLA-DQ2.5-alpha1 gliadin peptide in complex with DQN0344AE02 Deposited 2023-08-31 Assembly 3 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain L 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；294 K；0.1 M HEPES (pH7.5), 25.0 %w/v Polyethylene glycol 1,000, and 20 %v/v Glycerol as cryoprotectant
Resolution 2.82 Å R-free 0.321
8W83 HLA-DQ2.5-alpha1 gliadin peptide in complex with DQN0344AE02 Deposited 2023-08-31 Assembly 4 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain P 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；294 K；0.1 M HEPES (pH7.5), 25.0 %w/v Polyethylene glycol 1,000, and 20 %v/v Glycerol as cryoprotectant
Resolution 2.82 Å R-free 0.321
8W84 HLA-DQ2.5-alpha2 gliadin peptide in complex with DQN0344AE02 Deposited 2023-08-31 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；293 K；80 mM di-Sodium malonate (pH4.0), 9.6 %w/v Polyethylene glycol 3,350, and 25 %v/v Ethylene glycol as cryoprotectant
Resolution 2.10 Å R-free 0.325
8W85 HLA-DQ2.5-gamma2 gliadin peptide in complex with DQN0385AE01 Deposited 2023-08-31 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；294 K；0.1 M Ammonium sulfate, 10.0 %w/v Polyethylene glycol 3,350, and 30 %v/v Ethylene glycol as cryoprotectant
Resolution 2.77 Å R-free 0.300
8W85 HLA-DQ2.5-gamma2 gliadin peptide in complex with DQN0385AE01 Deposited 2023-08-31 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain H 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；294 K；0.1 M Ammonium sulfate, 10.0 %w/v Polyethylene glycol 3,350, and 30 %v/v Ethylene glycol as cryoprotectant
Resolution 2.77 Å R-free 0.300
8W86 HLA-DQ2.5-B/C hordein peptide in complex with DQN0385AE02 Deposited 2023-08-31 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；294 K；0.1 M MES monohydrate (pH5.5), 12.0 %w/v Polyethylene glycol 8,000, 0.1 M Calcium acetate hydrate, and 30 %v/v Ethylene glycol as cryoprotectant
Resolution 2.24 Å R-free 0.280
8W86 HLA-DQ2.5-B/C hordein peptide in complex with DQN0385AE02 Deposited 2023-08-31 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain H 1–190（190 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；294 K；0.1 M MES monohydrate (pH5.5), 12.0 %w/v Polyethylene glycol 8,000, 0.1 M Calcium acetate hydrate, and 30 %v/v Ethylene glycol as cryoprotectant
Resolution 2.24 Å R-free 0.280
9EJG Peptide-independent T cell receptor recognition of HLA-DQ2 Deposited 2024-11-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–194（194 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 FMT FORMIC ACID × 5 GOL GLYCEROL × 2 ACT ACETATE ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；8% Tacsimate, pH 8.0, 20-24% w/v PEG3350
Resolution 2.20 Å R-free 0.225
9EJH Peptide-independent T cell receptor recognition of HLA-DQ2 Deposited 2024-11-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–192（192 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ACT ACETATE ION × 4 GOL GLYCEROL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；8% Tacsimate, pH 8.0, 20-24% w/v PEG3350
Resolution 2.45 Å R-free 0.232

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.