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- PDB-9nfc: Structure of the cross-HLA supertype antibody R302 bound to a cla... -

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Basic information

Entry
Database: PDB / ID: 9nfc
TitleStructure of the cross-HLA supertype antibody R302 bound to a class I MHC presenting a divarasib-modified KRAS-G12C peptide on HLA-A*03
Components
  • Beta-2-microglobulin
  • GTPase KRas, N-terminally processed
  • HLA class I histocompatibility antigen, A alpha chain
  • R302 Fab heavy chain
  • R302 Fab light chain
KeywordsPROTEIN BINDING / Antibody / Cancer-neoantigen / complex
Function / homology
Function and homology information


positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / response to mineralocorticoid / GMP binding / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / forebrain astrocyte development / positive regulation of CD8-positive, alpha-beta T cell proliferation ...positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / response to mineralocorticoid / GMP binding / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / forebrain astrocyte development / positive regulation of CD8-positive, alpha-beta T cell proliferation / LRR domain binding / regulation of synaptic transmission, GABAergic / negative regulation of epithelial cell differentiation / response to isolation stress / CD8 receptor binding / response to gravity / epithelial tube branching involved in lung morphogenesis / antigen processing and presentation of exogenous peptide antigen via MHC class I / type I pneumocyte differentiation / beta-2-microglobulin binding / Rac protein signal transduction / endoplasmic reticulum exit site / positive regulation of Rac protein signal transduction / TAP binding / 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 / myoblast proliferation / protection from natural killer cell mediated cytotoxicity / skeletal muscle cell differentiation / RAS signaling downstream of NF1 loss-of-function variants / RUNX3 regulates p14-ARF / positive regulation of glial cell proliferation / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / SOS-mediated signalling / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / Activated NTRK3 signals through RAS / Activated NTRK2 signals through RAS / SHC1 events in ERBB4 signaling / cardiac muscle cell proliferation / Signalling to RAS / Activated NTRK2 signals through FRS2 and FRS3 / SHC-related events triggered by IGF1R / detection of bacterium / Estrogen-stimulated signaling through PRKCZ / glial cell proliferation / SHC-mediated cascade:FGFR3 / MET activates RAS signaling / T cell receptor binding / SHC-mediated cascade:FGFR2 / PTK6 Regulates RHO GTPases, RAS GTPase and MAP kinases / Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants / Signaling by PDGFRA extracellular domain mutants / SHC-mediated cascade:FGFR4 / Erythropoietin activates RAS / Signaling by FGFR4 in disease / SHC-mediated cascade:FGFR1 / Signaling by CSF3 (G-CSF) / FRS-mediated FGFR3 signaling / Signaling by FLT3 ITD and TKD mutants / FRS-mediated FGFR2 signaling / FRS-mediated FGFR4 signaling / protein-membrane adaptor activity / p38MAPK events / FRS-mediated FGFR1 signaling / Signaling by FGFR3 in disease / Tie2 Signaling / striated muscle cell differentiation / Signaling by FGFR2 in disease / 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 / homeostasis of number of cells within a tissue / GRB2 events in ERBB2 signaling / Downstream signal transduction / Ras activation upon Ca2+ influx through NMDA receptor / Insulin receptor signalling cascade / SHC1 events in ERBB2 signaling / response to glucocorticoid / Constitutive Signaling by Overexpressed ERBB2 / Signaling by phosphorylated juxtamembrane, extracellular and kinase domain KIT mutants / negative regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / VEGFR2 mediated cell proliferation / transferrin transport / small monomeric GTPase / cellular response to iron ion / lumenal side of endoplasmic reticulum membrane / Endosomal/Vacuolar pathway / FCERI mediated MAPK activation / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / peptide antigen assembly with MHC class II protein complex
Similarity search - Function
Small GTPase, Ras-type / Small GTPase Ras domain 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 / Class I Histocompatibility antigen, domains alpha 1 and 2 / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Small GTPase ...Small GTPase, Ras-type / Small GTPase Ras domain 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 / Class I Histocompatibility antigen, domains alpha 1 and 2 / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / 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
Similarity search - Domain/homology
: / GTPase KRas / HLA class I histocompatibility antigen, A alpha chain / Beta-2-microglobulin
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.58 Å
AuthorsMaso, L.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: To Be Published
Title: Engineered antibodies that stabilize drug-modified KRASG12C neoantigens enable selective and potent cross-HLA immunotherapy
Authors: Maso, L. / Mosure, S.A. / Rodriguez-Aponte, S.A. / Pizzo, A. / Mensah, D.N. / Southard, M. / Sze, S. / Vash, B. / Hattori, T. / Rajak, E. / Koide, A. / Neel, B.G. / Koide, S. / Liu, W. / ...Authors: Maso, L. / Mosure, S.A. / Rodriguez-Aponte, S.A. / Pizzo, A. / Mensah, D.N. / Southard, M. / Sze, S. / Vash, B. / Hattori, T. / Rajak, E. / Koide, A. / Neel, B.G. / Koide, S. / Liu, W. / Toenjes, S.T. / DaSilva-Jardine, P. / Chopra, R. / Rader, C. / Stopfer, L.E.
History
DepositionFeb 21, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 8, 2025Provider: repository / Type: Initial release
Revision 1.0Oct 8, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Oct 8, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Oct 8, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 8, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 8, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Oct 8, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Oct 8, 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

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Assembly

Deposited unit
A: HLA class I histocompatibility antigen, A alpha chain
B: Beta-2-microglobulin
C: GTPase KRas, N-terminally processed
D: R302 Fab light chain
E: R302 Fab heavy chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)96,8386
Polymers96,2145
Non-polymers6241
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 AB

#1: Protein HLA class I histocompatibility antigen, A alpha chain / Human leukocyte antigen A / HLA-A


Mass: 35323.738 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-A, HLAA / Production host: Escherichia coli (E. coli) / References: UniProt: P04439
#2: Protein Beta-2-microglobulin


Mass: 11892.291 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 (E. coli) / References: UniProt: P61769

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Antibody , 2 types, 2 molecules DE

#4: Antibody R302 Fab light chain


Mass: 23972.529 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#5: Antibody R302 Fab heavy chain


Mass: 24136.109 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)

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Protein/peptide / Non-polymers , 2 types, 2 molecules C

#3: Protein/peptide GTPase KRas, N-terminally processed


Mass: 889.094 Da / Num. of mol.: 1 / Mutation: G12C / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human) / References: UniProt: P01116
#6: Chemical ChemComp-A1AWR / 1-{(3S)-4-[(7M)-7-[6-amino-4-methyl-3-(trifluoromethyl)pyridin-2-yl]-6-chloro-8-fluoro-2-{[(2S)-1-methylpyrrolidin-2-yl]methoxy}quinazolin-4-yl]-3-methylpiperazin-1-yl}propan-1-one / divarasib, bound form


Mass: 624.073 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C29H34ClF4N7O2 / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
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: Binary complex of Fab R302 with divarasib-conjugated KRAS G12C peptide (7-16) presented by class I MHC having HLA-A*03:01
Type: COMPLEX / Entity ID: #1-#5 / Source: RECOMBINANT
Molecular weightValue: 0.1 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.4
SpecimenConc.: 4.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R0.6/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K / Details: blot time 4 s blot force 5

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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 magnification: 105000 X / Nominal defocus max: 2700 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 47.42 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM softwareName: Leginon / Version: 3.6 / Category: image acquisition
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.58 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 144769 / Symmetry type: POINT

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