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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：P06126 New Search
15PDB entries
19Biological assembly
19chain/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
1ONQ Crystal Structure of CD1a in Complex with a Sulfatide Deposited 2003-02-28 Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 18–294（277 aa）
Not recorded FUC alpha-L-fucopyranose × 1 SLF SULFATE-3-D-GALACTOSYL-BETA-1-1-N-STEAROYL-D-SPHINGOSINE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.5；277 K；MPEG 2000, Tris, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 277.0K, pH 8.50
Resolution 2.15 Å R-free 0.276
1ONQ Crystal Structure of CD1a in Complex with a Sulfatide Deposited 2003-02-28 Assembly 2 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 18–294（277 aa）
Not recorded FUC alpha-L-fucopyranose × 1 SLF SULFATE-3-D-GALACTOSYL-BETA-1-1-N-STEAROYL-D-SPHINGOSINE × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.5；277 K；MPEG 2000, Tris, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 277.0K, pH 8.50
Resolution 2.15 Å R-free 0.276
1XZ0 Crystal structure of CD1a in complex with a synthetic mycobactin lipopeptide Deposited 2004-11-11 Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 18–294（277 aa）
Not recorded JH0 6-(HYDROXY-HEXADECANOYL-AMINO)-2-{[(4S)-2-(2-HYDROXY-PHENYL)-4,5-DIHYDRO-OXAZOLE-4-CARBONYL]-AMINO}-HEXANOIC ACID 2-[(3S)-1-(TERT-BUTYL-DIPHENYL-SILANYLOXY)-2-OXO-AZEPAN-3-YLCARBAMOYL]-(1S)-1-METHYL-ETHYL ESTER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；295 K；PEG 2000 MME, Tris, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 295K
Resolution 2.80 Å R-free 0.277
1XZ0 Crystal structure of CD1a in complex with a synthetic mycobactin lipopeptide Deposited 2004-11-11 Assembly 2 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 18–294（277 aa）
Not recorded JH0 6-(HYDROXY-HEXADECANOYL-AMINO)-2-{[(4S)-2-(2-HYDROXY-PHENYL)-4,5-DIHYDRO-OXAZOLE-4-CARBONYL]-AMINO}-HEXANOIC ACID 2-[(3S)-1-(TERT-BUTYL-DIPHENYL-SILANYLOXY)-2-OXO-AZEPAN-3-YLCARBAMOYL]-(1S)-1-METHYL-ETHYL ESTER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；295 K；PEG 2000 MME, Tris, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 295K
Resolution 2.80 Å R-free 0.277
4X6C CD1a ternary complex with lysophosphatidylcholine and BK6 TCR Deposited 2014-12-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 21–295（275 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 42H (4R,7R,18Z)-4,7-dihydroxy-N,N,N-trimethyl-10-oxo-3,5,9-trioxa-4-phosphaheptacos-18-en-1-aminium 4-oxide × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；sodium citrate, bis-tris propane, PEG 3350
Resolution 2.80 Å R-free 0.236
4X6C CD1a ternary complex with lysophosphatidylcholine and BK6 TCR Deposited 2014-12-08 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 21–295（275 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 42H (4R,7R,18Z)-4,7-dihydroxy-N,N,N-trimethyl-10-oxo-3,5,9-trioxa-4-phosphaheptacos-18-en-1-aminium 4-oxide × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；sodium citrate, bis-tris propane, PEG 3350
Resolution 2.80 Å R-free 0.236
4X6D CD1a ternary complex with endogenous lipids and BK6 TCR Deposited 2014-12-08 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 21–295（275 aa）
Not recorded OLA OLEIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；sodium citrate, bis-tris propane, PEG 3350
Resolution 2.98 Å R-free 0.229
4X6D CD1a ternary complex with endogenous lipids and BK6 TCR Deposited 2014-12-08 Assembly 2 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 21–295（275 aa）
Not recorded PAM PALMITOLEIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；sodium citrate, bis-tris propane, PEG 3350
Resolution 2.98 Å R-free 0.229
4X6E CD1a binary complex with lysophosphatidylcholine Deposited 2014-12-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 21–295（275 aa）
Not recorded MLT D-MALATE × 1 42H (4R,7R,18Z)-4,7-dihydroxy-N,N,N-trimethyl-10-oxo-3,5,9-trioxa-4-phosphaheptacos-18-en-1-aminium 4-oxide × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20 mM DL-malic acid, 40 mM MES, 40 mM tris, PEG 1500
Resolution 2.10 Å R-free 0.234
4X6F CD1a binary complex with sphingomyelin Deposited 2014-12-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 21–295（275 aa）
Not recorded 3XU (4S,7S,23Z)-4-hydroxy-7-[(1S,2Z)-1-hydroxyhexadec-2-en-1-yl]-N,N,N-trimethyl-9-oxo-3,5-dioxa-8-aza-4-phosphadotriacont- 23-en-1-aminium 4-oxide × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20 mM DL-malic acid, 40 mM MES, 40 mM tris, PEG 1500
Resolution 1.91 Å R-free 0.224
5J1A Antigen presenting molecule Deposited 2016-03-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–295（295 aa）
Mutation：T30I, C51W 6F8 3-[(8Z,11Z)-pentadeca-8,11-dien-1-yl]benzene-1,2-diol × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20-25% PEG 1500 / 10% MMT buffer pH 5-6
Resolution 1.86 Å R-free 0.217
7KOZ CD1a-36:2 SM binary complex Deposited 2020-11-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded WU7 (4S,7S,17Z)-4-hydroxy-7-[(1S,2E)-1-hydroxyhexadec-2-en-1-yl]-N,N,N-trimethyl-4,9-dioxo-3,5-dioxa-8-aza-4lambda~5~-phosphahexacos-17-en-1-aminium × 1 EDO 1,2-ETHANEDIOL × 4 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20-25% PEG 1500, 0.1M MMT pH 5.5
Resolution 2.25 Å R-free 0.246
7KP0 CD1a-42:1 SM binary complex Deposited 2020-11-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded WUA (4R,7S)-4-hydroxy-7-[(1S,2E)-1-hydroxyhexadec-2-en-1-yl]-N,N,N-trimethyl-4,9-dioxo-3,5-dioxa-8-aza-4lambda~5~-phosphadotriacontan-1-aminium × 1 EDO 1,2-ETHANEDIOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20-25% PEG 1500, 0.1M MMT pH 5.5
Resolution 2.40 Å R-free 0.264
7KP1 CD1a-42:2 SM binary complex Deposited 2020-11-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded FO4 sphingomyelin × 1 MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20-25% PEG 1500, 0.1M MMT pH 5.5
Resolution 2.02 Å R-free 0.226
7RYM CD1a-endo-gdTCR complex Deposited 2021-08-25 Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded PEG DI(HYDROXYETHYL)ETHER × 1 SO4 SULFATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；20% PEG3350, 0.2M Ammonium Sulfate
Resolution 3.20 Å R-free 0.286
7RYN CD1a-sulfatide-gdTCR complex Deposited 2021-08-25 Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded CIS (15Z)-N-((1S,2R,3E)-2-HYDROXY-1-{[(3-O-SULFO-BETA-D-GALACTOPYRANOSYL)OXY]METHYL}HEPTADEC-3-ENYL)TETRACOS-15-ENAMIDE × 1 EDO 1,2-ETHANEDIOL × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PEG DI(HYDROXYETHYL)ETHER × 1 SO4 SULFATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；15% PEG 4000, 0.15M Ammonium Sulfate, 0.1M MES pH6
Resolution 2.70 Å R-free 0.268
7RYO CD1a-dideoxymycobactin-gdTCR complex Deposited 2021-08-25 Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded EDO 1,2-ETHANEDIOL × 2 WGR dideoxymycobactin-838 × 1 SO4 SULFATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20% PEG 3350, 0.2M Ammonium sulfate
Resolution 3.00 Å R-free 0.267
7SH4 CD1a-phosphatidylglycerol binary structure Deposited 2021-10-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 18–295（278 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 MW9 (21R,24R,27S)-24,27,28-trihydroxy-18,24-dioxo-19,23,25-trioxa-24lambda~5~-phosphaoctacosan-21-yl (9Z)-octadec-9-enoate × 1 EDO 1,2-ETHANEDIOL × 2 MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 PEG DI(HYDROXYETHYL)ETHER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；293 K；20-25% PEG 1500, 0.1M MMT pH 5.5
Resolution 2.00 Å R-free 0.230
9OHZ Crystal structure of CD1a presenting ganglioside GD3 Deposited 2025-05-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 20–295（276 aa）
Mutation：C68W NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 A1CB9 N-{(2S,3R)-1-[(4-O-beta-D-galactopyranosyl-beta-D-glucopyranosyl)oxy]-3-hydroxyoctadecan-2-yl}tetracosanamide × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；293 K；21% PEG 1500, 0.1M MMT pH 5.5
Resolution 2.14 Å R-free 0.247

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.