- EMDB-73458: Designed antibody vAB66 targeting PAP-HLA A*02:01 -
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Basic information
Entry
Database: EMDB / ID: EMD-73458
Title
Designed antibody vAB66 targeting PAP-HLA A*02:01
Map data
main map from nonuniform refinement, uniformly sharpened
Sample
Complex: vAB-66 Fab bound to HLA-A*02:01 displaying PAP peptide with AD01 nanobofy fiducial
Complex: HLA A*02:01 displaying PAP peptide
Complex: HLA A*02:01
Protein or peptide: HLA class I histocompatibility antigen, A alpha chain
Protein or peptide: Beta-2-microglobulin
Complex: PAP peptide
Protein or peptide: Prostatic acid phosphatase-derived peptide
Complex: vAB66 Fab
Protein or peptide: vAB66 heavy chain
Protein or peptide: vAB66 light chain
Complex: AD01 nanobody
Protein or peptide: AD01 nanobody
Ligand: water
Keywords
Fab / complex / immunology / DE NOVO PROTEIN / DE NOVO PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information
thiamine phosphate phosphatase activity / positive regulation of adenosine receptor signaling pathway / thiamine metabolic process / Golgi cisterna / adenosine metabolic process / acid phosphatase / regulation of sensory perception of pain / acid phosphatase activity / lysophosphatidic acid phosphatase activity / 5'-nucleotidase ...thiamine phosphate phosphatase activity / positive regulation of adenosine receptor signaling pathway / thiamine metabolic process / Golgi cisterna / adenosine metabolic process / acid phosphatase / regulation of sensory perception of pain / acid phosphatase activity / lysophosphatidic acid phosphatase activity / 5'-nucleotidase / 5'-nucleotidase activity / choline binding / nucleotide metabolic process / dephosphorylation / vesicle membrane / azurophil granule membrane / phosphatase activity / purine nucleobase metabolic process / antigen processing and presentation of peptide antigen via MHC class I / multivesicular body / protein-tyrosine-phosphatase / protein tyrosine phosphatase activity / 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 / filopodium / 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 / MHC class II protein complex / negative regulation of forebrain neuron differentiation / 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 / positive regulation of receptor-mediated endocytosis / negative regulation of neurogenesis / cellular response to nicotine / positive regulation of T cell mediated cytotoxicity / multicellular organismal-level iron ion homeostasis / lipid metabolic process / specific granule lumen / phagocytic vesicle membrane / recycling endosome membrane / Interferon gamma signaling / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / apical part of 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 / molecular adaptor activity / intracellular iron ion homeostasis / learning or memory / endoplasmic reticulum lumen / Amyloid fiber formation / Golgi membrane / lysosomal membrane / external side of plasma 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 / nucleus / membrane Similarity search - Function
Histidine acid phosphatases active site signature. / : / Histidine acid phosphatases phosphohistidine signature. / Histidine acid phosphatase active site / Histidine phosphatase superfamily, clade-2 / Histidine phosphatase superfamily (branch 2) / Histidine phosphatase superfamily / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / Beta-2-Microglobulin ...Histidine acid phosphatases active site signature. / : / Histidine acid phosphatases phosphohistidine signature. / Histidine acid phosphatase active site / Histidine phosphatase superfamily, clade-2 / Histidine phosphatase superfamily (branch 2) / Histidine phosphatase superfamily / 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
National Institutes of Health/National Cancer Institute (NIH/NCI)
OT2CA297242
United States
Cancer Research UK
CGCATF-2023/100006
United Kingdom
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI103867 08
United States
Citation
Journal: bioRxiv / Year: 2025 Title: Targeting peptide-MHC complexes with designed T cell receptors and antibodies. Authors: Amir Motmaen / Kevin M Jude / Nan Wang / Anastasia Minervina / David Feldman / Mauriz A Lichtenstein / Abishai Ebenezer / Colin Correnti / Paul G Thomas / K Christopher Garcia / David Baker / Philip Bradley Abstract: Class I major histocompatibility complexes (MHCs), expressed on the surface of all nucleated cells, present peptides derived from intracellular proteins for surveillance by T cells. The precise ...Class I major histocompatibility complexes (MHCs), expressed on the surface of all nucleated cells, present peptides derived from intracellular proteins for surveillance by T cells. The precise recognition of foreign or mutated peptide-MHC (pMHC) complexes by T cell receptors (TCRs) is central to immune defense against pathogens and tumors. Although patient-derived TCRs specific for cancer-associated antigens have been used to engineer tumor-targeting therapies, their reactivity toward self- or near-self antigens may be constrained by negative selection in the thymus. Here, we introduce a structure-based deep learning framework, ADAPT (Antigen-receptor Design Against Peptide-MHC Targets), for the design of TCRs and antibodies that bind to pMHC targets of interest. We evaluate the ADAPT pipeline by designing and characterizing TCRs and antibodies against a diverse panel of pMHCs. Cryogenic electron microscopy structures of two designed antibodies bound to their respective pMHC targets demonstrate atomic-level accuracy at the recognition interface, supporting the robustness of our structure-based approach. Computationally designed TCRs and antibodies targeting pMHC complexes could enable a broad range of therapeutic applications, from cancer immunotherapy to autoimmune disease treatment, and insights gained from TCR-pMHC design should advance predictive understanding of TCR specificity with implications for basic immunology and clinical diagnostics.
Macromolecule #1: HLA class I histocompatibility antigen, A alpha chain
Macromolecule
Name: HLA class I histocompatibility antigen, A alpha chain / type: protein_or_peptide / ID: 1 / Details: Met1 is a cloning artifact / Number of copies: 1 / Enantiomer: LEVO
Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: OTHER / Pretreatment - Pressure: 0.00039000000000000005 kPa
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
TFS KRIOS
Specialist optics
Energy filter - Name: TFS Selectris X / Energy filter - Slit width: 6 eV
Image recording
Film or detector model: TFS FALCON 4i (4k x 4k) / Number grids imaged: 1 / Number real images: 12293 / Average exposure time: 5.893 sec. / Average electron dose: 50.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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