- PDB-8vra: Structure of a synthetic antibody in complex with a class I MHC p... -
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基本情報
登録情報
データベース: PDB / ID: 8vra
タイトル
Structure of a synthetic antibody in complex with a class I MHC presenting a hapten-peptide conjugate
要素
Beta-2-microglobulin
GTPase KRas, N-terminally processed
HLA class I histocompatibility antigen, A alpha chain
R023 Fab heavy chain
R023 Fab light chain
キーワード
IMMUNE SYSTEM / Complex / Synthetic antibody / MHC class I / covalently modified peptide
機能・相同性
機能・相同性情報
forebrain astrocyte development / positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / positive regulation of CD8-positive, alpha-beta T cell proliferation / negative regulation of epithelial cell differentiation / CD8 receptor binding ...forebrain astrocyte development / positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / positive regulation of CD8-positive, alpha-beta T cell proliferation / negative regulation of epithelial cell differentiation / CD8 receptor binding / type I pneumocyte differentiation / regulation of synaptic transmission, GABAergic / epithelial tube branching involved in lung morphogenesis / Rac protein signal transduction / antigen processing and presentation of exogenous peptide antigen via MHC class I / beta-2-microglobulin binding / positive regulation of Rac protein signal transduction / skeletal muscle cell differentiation / endoplasmic reticulum exit site / Signaling by RAS GAP mutants / Signaling by RAS GTPase mutants / Activation of RAS in B cells / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent / TAP binding / RAS signaling downstream of NF1 loss-of-function variants / protection from natural killer cell mediated cytotoxicity / RUNX3 regulates p14-ARF / SOS-mediated signalling / Activated NTRK3 signals through RAS / Activated NTRK2 signals through RAS / SHC1 events in ERBB4 signaling / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / Signalling to RAS / Activated NTRK2 signals through FRS2 and FRS3 / SHC-related events triggered by IGF1R / glial cell proliferation / Estrogen-stimulated signaling through PRKCZ / SHC-mediated cascade:FGFR3 / detection of bacterium / MET activates RAS signaling / T cell receptor binding / SHC-mediated cascade:FGFR2 / Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants / Signaling by PDGFRA extracellular domain mutants / PTK6 Regulates RHO GTPases, RAS GTPase and MAP kinases / SHC-mediated cascade:FGFR4 / Signaling by CSF3 (G-CSF) / Signaling by FGFR4 in disease / Erythropoietin activates RAS / SHC-mediated cascade:FGFR1 / FRS-mediated FGFR3 signaling / Signaling by FLT3 ITD and TKD mutants / protein-membrane adaptor activity / FRS-mediated FGFR2 signaling / FRS-mediated FGFR4 signaling / Signaling by FGFR3 in disease / p38MAPK events / Tie2 Signaling / positive regulation of glial cell proliferation / FRS-mediated FGFR1 signaling / homeostasis of number of cells within a tissue / Signaling by FGFR2 in disease / striated muscle cell differentiation / GRB2 events in EGFR signaling / SHC1 events in EGFR signaling / Signaling by FLT3 fusion proteins / FLT3 Signaling / Signaling by FGFR1 in disease / EGFR Transactivation by Gastrin / NCAM signaling for neurite out-growth / CD209 (DC-SIGN) signaling / GRB2 events in ERBB2 signaling / Downstream signal transduction / Ras activation upon Ca2+ influx through NMDA receptor / SHC1 events in ERBB2 signaling / Insulin receptor signalling cascade / Constitutive Signaling by Overexpressed ERBB2 / Signaling by phosphorylated juxtamembrane, extracellular and kinase domain KIT mutants / : / : / positive regulation of receptor binding / early endosome lumen / VEGFR2 mediated cell proliferation / Nef mediated downregulation of MHC class I complex cell surface expression / negative regulation of receptor binding / DAP12 interactions / small monomeric GTPase / cellular response to iron ion / lumenal side of endoplasmic reticulum membrane / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / FCERI mediated MAPK activation / peptide antigen assembly with MHC class II protein complex / cellular response to iron(III) ion / RAF activation / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / MHC class II protein complex / negative regulation of forebrain neuron differentiation / regulation of long-term neuronal synaptic plasticity 類似検索 - 分子機能
Small GTPase, Ras-type / small GTPase Ras family profile. / Ran (Ras-related nuclear proteins) /TC4 subfamily of small GTPases / MHC class I, alpha chain, C-terminal / MHC_I C-terminus / MHC class I alpha chain, alpha1 alpha2 domains / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Class I Histocompatibility antigen, domains alpha 1 and 2 / Small GTPase ...Small GTPase, Ras-type / small GTPase Ras family profile. / Ran (Ras-related nuclear proteins) /TC4 subfamily of small GTPases / MHC class I, alpha chain, C-terminal / MHC_I C-terminus / MHC class I alpha chain, alpha1 alpha2 domains / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Class I Histocompatibility antigen, domains alpha 1 and 2 / Small GTPase / Ras family / Beta-2-Microglobulin / : / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / Rab subfamily of small GTPases / MHC classes I/II-like antigen recognition protein / : / Small GTP-binding protein domain / 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 / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
AMG 510 (bound form) / GTPase KRas / HLA class I histocompatibility antigen, A alpha chain / Beta-2-microglobulin 類似検索 - 構成要素
National Institutes of Health/National Cancer Institute (NIH/NCI)
米国
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2024 タイトル: Molecular basis for antibody recognition of multiple drug-peptide/MHC complexes. 著者: Lorenzo Maso / Epsa Rajak / Injin Bang / Akiko Koide / Takamitsu Hattori / Benjamin G Neel / Shohei Koide / 要旨: The HapImmune platform exploits covalent inhibitors as haptens for creating major histocompatibility complex (MHC)-presented tumor-specific neoantigens by design, combining targeted therapies with ...The HapImmune platform exploits covalent inhibitors as haptens for creating major histocompatibility complex (MHC)-presented tumor-specific neoantigens by design, combining targeted therapies with immunotherapy for the treatment of drug-resistant cancers. A HapImmune antibody, R023, recognizes multiple sotorasib-conjugated KRAS(G12C) peptides presented by different human leukocyte antigens (HLAs). This high specificity to sotorasib, coupled with broad HLA-binding capability, enables such antibodies, when reformatted as T cell engagers, to potently and selectively kill sotorasib-resistant KRAS(G12C) cancer cells expressing different HLAs upon sotorasib treatment. The loosening of HLA restriction could increase the patient population that can benefit from this therapeutic approach. To understand the molecular basis for its unconventional binding capability, we used single-particle cryogenic electron microscopy to determine the structures of R023 bound to multiple sotorasib-peptide conjugates presented by different HLAs. R023 forms a pocket for sotorasib between the V and V domains, binds HLAs in an unconventional, angled way, with V making most contacts with them, and makes few contacts with the peptide moieties. This binding mode enables the antibody to accommodate different hapten-peptide conjugates and to adjust its conformation to different HLAs presenting hapten-peptides. Deep mutational scanning validated the structures and revealed distinct levels of mutation tolerance by sotorasib- and HLA-binding residues. Together, our structural information and sequence landscape analysis reveal key features for achieving MHC-restricted recognition of multiple hapten-peptide antigens, which will inform the development of next-generation therapeutic antibodies.
#236 - 2019年8月 サイクリンとサイクリン依存性キナーゼ (Cyclin and Cyclin-dependent Kinase) 類似性 (1)
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集合体
登録構造単位
A: HLA class I histocompatibility antigen, A alpha chain B: Beta-2-microglobulin C: GTPase KRas, N-terminally processed D: R023 Fab light chain E: R023 Fab heavy chain ヘテロ分子