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- PDB-9hkq: Structure of VHH5 targeting NY-ESO-1(SLLMWITQC)/HLA-A*02:01 -

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Basic information

Entry
Database: PDB / ID: 9hkq
TitleStructure of VHH5 targeting NY-ESO-1(SLLMWITQC)/HLA-A*02:01
Components
  • (BM17 antibody ...) x 2
  • Beta-2-microglobulin
  • Cancer/testis antigen 1
  • MHC class I antigen
  • single domain antibody VHH5
KeywordsPROTEIN BINDING / VHH / TCR-mimic antibody / NY-ESO-1 / HLA-A*02:01
Function / homology
Function and homology information


tRNA threonylcarbamoyladenosine metabolic process / antigen processing and presentation of peptide antigen via MHC class I / 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 ...tRNA threonylcarbamoyladenosine metabolic process / antigen processing and presentation of peptide antigen via MHC class I / 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 / lumenal side of endoplasmic reticulum membrane / 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 / intracellular iron ion homeostasis / learning or memory / endoplasmic reticulum lumen / Amyloid fiber formation / Golgi membrane / external side of plasma membrane / lysosomal membrane / focal adhesion / Neutrophil degranulation / SARS-CoV-2 activates/modulates innate and adaptive immune responses / structural molecule activity / endoplasmic reticulum / Golgi apparatus / protein homodimerization activity / extracellular space / extracellular exosome / extracellular region / identical protein binding / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
CTAG/Pcc1 family / Transcription factor Pcc1 / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / 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 / : ...CTAG/Pcc1 family / Transcription factor Pcc1 / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / 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
Beta-2-microglobulin / Cancer/testis antigen 1 / MHC class I antigen
Similarity search - Component
Biological speciesMus musculus (house mouse)
Homo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsJie, B. / Shenghai, C. / Liqiang, P. / Xing, Z.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: Targeting Intracellular Antigen with TCR-Mimic Single-Domain Antibody for Cancer Immunotherapy
Authors: Jie, B. / Shanghai, C. / Xinyu, G. / Yanping, S. / Linling, Z. / Lingxiao, J. / Shuqing, C. / Xinlei, Z. / Xing, Z. / Liqiang, P.
History
DepositionDec 4, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Dec 17, 2025Provider: repository / Type: Initial release
Revision 1.0Dec 17, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Dec 17, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 17, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 17, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 17, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
D: BM17 antibody heavy chain
E: BM17 antibody light chain
C: Beta-2-microglobulin
B: MHC class I antigen
A: Cancer/testis antigen 1
F: single domain antibody VHH5


Theoretical massNumber of molelcules
Total (without water)103,5126
Polymers103,5126
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Protein , 2 types, 2 molecules CB

#3: Protein Beta-2-microglobulin


Mass: 11748.160 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: B2M, CDABP0092, HDCMA22P / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P61769
#4: Protein MHC class I antigen


Mass: 31725.088 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-A / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q8WLS4

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Protein/peptide , 1 types, 1 molecules A

#5: Protein/peptide Cancer/testis antigen 1 / Autoimmunogenic cancer/testis antigen NY-ESO-1 / Cancer/testis antigen 6.1 / CT6.1 / L antigen ...Autoimmunogenic cancer/testis antigen NY-ESO-1 / Cancer/testis antigen 6.1 / CT6.1 / L antigen family member 2 / LAGE-2


Mass: 1094.347 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human) / References: UniProt: P78358

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Antibody , 3 types, 3 molecules DEF

#1: Antibody BM17 antibody heavy chain


Mass: 23968.760 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)
#2: Antibody BM17 antibody light chain


Mass: 22690.266 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)
#6: Antibody single domain antibody VHH5


Mass: 12285.523 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli BL21(DE3) (bacteria)

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Details

Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: ternary complex of VHH5-pHLA with human beta-2m Fab / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1600 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 224538 / Symmetry type: POINT
RefinementHighest resolution: 3.3 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0037445
ELECTRON MICROSCOPYf_angle_d0.55910114
ELECTRON MICROSCOPYf_dihedral_angle_d4.7731012
ELECTRON MICROSCOPYf_chiral_restr0.0421087
ELECTRON MICROSCOPYf_plane_restr0.0041295

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