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- PDB-9oi0: Crystal structure of CD1b presenting ganglioside GD3 -

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Basic information

Entry
Database: PDB / ID: 9oi0
TitleCrystal structure of CD1b presenting ganglioside GD3
Components
  • Beta-2-microglobulin
  • T-cell surface glycoprotein CD1b
KeywordsIMMUNE SYSTEM / CD1b / antigen presentation / adaptive immunity / lipid / GD3
Function / homology
Function and homology information


exogenous lipid antigen binding / antigen processing and presentation, endogenous lipid antigen via MHC class Ib / lipopeptide binding / endogenous lipid antigen binding / antigen processing and presentation, exogenous lipid antigen via MHC class Ib / negative regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / transferrin transport ...exogenous lipid antigen binding / antigen processing and presentation, endogenous lipid antigen via MHC class Ib / lipopeptide binding / endogenous lipid antigen binding / antigen processing and presentation, exogenous lipid antigen via MHC class Ib / negative regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / transferrin transport / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / peptide antigen assembly with MHC class II protein complex / cellular response to iron(III) ion / negative regulation of forebrain neuron differentiation / MHC class II protein complex / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / regulation of iron ion transport / regulation of erythrocyte differentiation / HFE-transferrin receptor complex / response to molecule of bacterial origin / MHC class I peptide loading complex / T cell mediated cytotoxicity / positive regulation of T cell cytokine production / antigen processing and presentation of endogenous peptide antigen via MHC class I / antigen processing and presentation of exogenous peptide antigen via MHC class II / positive regulation of immune response / MHC class I protein complex / peptide antigen binding / positive regulation of T cell activation / negative regulation of neurogenesis / positive regulation of receptor-mediated endocytosis / cellular response to nicotine / positive regulation of T cell mediated cytotoxicity / multicellular organismal-level iron ion homeostasis / specific granule lumen / phagocytic vesicle membrane / recycling endosome membrane / Interferon gamma signaling / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / negative regulation of epithelial cell proliferation / MHC class II protein complex binding / Modulation by Mtb of host immune system / late endosome membrane / sensory perception of smell / positive regulation of cellular senescence / tertiary granule lumen / DAP12 signaling / T cell differentiation in thymus / negative regulation of neuron projection development / ER-Phagosome pathway / protein refolding / early endosome membrane / protein homotetramerization / amyloid fibril formation / adaptive immune response / intracellular iron ion homeostasis / learning or memory / endosome membrane / immune response / endoplasmic reticulum lumen / Amyloid fiber formation / Golgi membrane / lysosomal membrane / external side of plasma membrane / focal adhesion / intracellular membrane-bounded organelle / Neutrophil degranulation / SARS-CoV-2 activates/modulates innate and adaptive immune responses / structural molecule activity / cell surface / endoplasmic reticulum / Golgi apparatus / protein homodimerization activity / extracellular space / extracellular exosome / extracellular region / identical protein binding / membrane / plasma membrane / cytosol
Similarity search - Function
MHC-I family domain / Beta-2-Microglobulin / : / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / MHC classes I/II-like antigen recognition protein / : / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type ...MHC-I family domain / Beta-2-Microglobulin / : / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / MHC classes I/II-like antigen recognition protein / : / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold
Similarity search - Domain/homology
: / tetracosyl octadecanoate / IODIDE ION / T-cell surface glycoprotein CD1b / Beta-2-microglobulin
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.84 Å
AuthorsChen, Y. / Cao, T.P. / Farquhar, R. / Rossjohn, J. / Shahine, A.
Funding support Australia, 1items
OrganizationGrant numberCountry
Australian Research Council (ARC)DE210101031 Australia
CitationJournal: Nat Commun / Year: 2025
Title: Sideways lipid presentation by the antigen-presenting molecule CD1c.
Authors: Cao, T.P. / Liao, G.R. / Cheng, T.Y. / Chen, Y. / Ciacchi, L. / Fulford, T.S. / Farquhar, R. / Kollmorgen, J. / Mayfield, J.A. / Uldrich, A.P. / Ng, E.Z.Q. / Ogg, G.S. / Godfrey, D.I. / ...Authors: Cao, T.P. / Liao, G.R. / Cheng, T.Y. / Chen, Y. / Ciacchi, L. / Fulford, T.S. / Farquhar, R. / Kollmorgen, J. / Mayfield, J.A. / Uldrich, A.P. / Ng, E.Z.Q. / Ogg, G.S. / Godfrey, D.I. / Gherardin, N.A. / Chen, Y.L. / Moody, D.B. / Shahine, A. / Rossjohn, J.
History
DepositionMay 5, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 19, 2025Provider: repository / Type: Initial release
Revision 1.1Jan 14, 2026Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: T-cell surface glycoprotein CD1b
B: Beta-2-microglobulin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)46,88016
Polymers42,8072
Non-polymers4,07314
Water5,513306
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration, Monomorphic elution of heterodimer by size exclusion chromatography, surface plasmon resonance, Heterodimer correctly interacts with binding partner by surface plasmon resonance
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area8300 Å2
ΔGint-7 kcal/mol
Surface area19470 Å2
MethodPISA
Unit cell
Length a, b, c (Å)57.566, 77.849, 92.123
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

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Protein , 2 types, 2 molecules AB

#1: Protein T-cell surface glycoprotein CD1b


Mass: 30963.939 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CD1B / Plasmid: pFastBac / Cell line (production host): Hi5 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P29016
#2: Protein Beta-2-microglobulin


Mass: 11843.260 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: B2M, CDABP0092, HDCMA22P / Plasmid: pFastBac / Cell line (production host): Hi5 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P61769

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Sugars , 2 types, 2 molecules

#3: Polysaccharide alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-3)][alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1203.105 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4[LFucpa1-3][LFucpa1-6]DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/4,7,6/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5][a1122h-1b_1-5][a1122h-1a_1-5]/1-2-1-3-4-4-2/a3-b1_a4-c1_a6-g1_c4-d1_d3-e1_d6-f1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(3+1)][a-L-Fucp]{}[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}[(6+1)][a-L-Fucp]{}}LINUCSPDB-CARE
#4: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 570.542 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5]/1-1-2/a4-b1_a6-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}[(6+1)][a-L-Fucp]{}}LINUCSPDB-CARE

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Non-polymers , 7 types, 318 molecules

#5: Chemical
ChemComp-IOD / IODIDE ION


Mass: 126.904 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: I
#6: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl
#7: Chemical ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL


Mass: 62.068 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C2H6O2
#8: Chemical ChemComp-A1CDL / N-{(2S,3R,4E)-1-[(4-O-beta-D-galactopyranosyl-beta-D-glucopyranosyl)oxy]-3-hydroxyoctadec-4-en-2-yl}octadecanamide / ganglioside GD3 isomer fragment


Mass: 890.235 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C48H91NO13 / Feature type: SUBJECT OF INVESTIGATION
#9: Chemical ChemComp-CUY / tetracosyl octadecanoate


Mass: 621.115 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C42H84O2
#10: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#11: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 306 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.27 Å3/Da / Density % sol: 45.77 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / Details: 22% PEG 3350, 0.1 M Sodium Iodide

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: Australian Synchrotron / Beamline: MX2 / Wavelength: 0.9537 Å
DetectorType: DECTRIS EIGER X 16M / Detector: PIXEL / Date: Feb 13, 2019
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9537 Å / Relative weight: 1
ReflectionResolution: 1.84→49.02 Å / Num. obs: 36782 / % possible obs: 100 % / Redundancy: 32.5 % / CC1/2: 1 / Rpim(I) all: 0.072 / Net I/σ(I): 7.2
Reflection shellResolution: 1.84→1.94 Å / Redundancy: 20.8 % / Mean I/σ(I) obs: 2 / Num. unique obs: 5313 / CC1/2: 0.25 / Rpim(I) all: 0.415 / % possible all: 100

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Processing

Software
NameVersionClassification
PHENIX(1.21.2_5419: ???)refinement
PDB_EXTRACTdata extraction
XDSdata reduction
Aimlessdata scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.84→46.29 Å / SU ML: 0.23 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 24.76 / Stereochemistry target values: ML
RfactorNum. reflection% reflection
Rfree0.2655 1831 4.99 %
Rwork0.2107 --
obs0.2133 36718 99.81 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.1 Å / Solvent model: FLAT BULK SOLVENT MODEL
Refinement stepCycle: LAST / Resolution: 1.84→46.29 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2983 0 235 306 3524
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0113366
X-RAY DIFFRACTIONf_angle_d1.564561
X-RAY DIFFRACTIONf_dihedral_angle_d22.9541355
X-RAY DIFFRACTIONf_chiral_restr0.091511
X-RAY DIFFRACTIONf_plane_restr0.011568
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
1.84-1.890.3521250.29872594X-RAY DIFFRACTION98
1.89-1.940.28821680.26472637X-RAY DIFFRACTION100
1.94-2.010.29451390.23982650X-RAY DIFFRACTION100
2.01-2.080.24231380.21282647X-RAY DIFFRACTION100
2.08-2.160.28811570.21322635X-RAY DIFFRACTION100
2.16-2.260.26241500.21222662X-RAY DIFFRACTION100
2.26-2.380.30651530.20922637X-RAY DIFFRACTION100
2.38-2.530.26191280.21292694X-RAY DIFFRACTION100
2.53-2.720.34451240.21392692X-RAY DIFFRACTION100
2.72-30.28191380.22432690X-RAY DIFFRACTION100
3-3.430.23571350.21212721X-RAY DIFFRACTION100
3.43-4.320.2351420.18932740X-RAY DIFFRACTION100
4.32-46.290.24731340.1942888X-RAY DIFFRACTION100
Refinement TLS params.Method: refined / Origin x: 13.0441 Å / Origin y: 5.5869 Å / Origin z: 9.9401 Å
111213212223313233
T0.151 Å2-0.0122 Å20.0177 Å2-0.1465 Å20.0016 Å2--0.1204 Å2
L1.412 °2-0.4959 °20.247 °2-0.7908 °2-0.1953 °2--0.5537 °2
S0.0883 Å °0.0377 Å °0.0534 Å °-0.0912 Å °-0.0924 Å °-0.0233 Å °0.115 Å °0.0098 Å °0.0049 Å °
Refinement TLS groupSelection details: all

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