6W51

Structure of the antibody fragment H2 in complex with HLA-A*02:01/p53R175H

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.53 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.204 

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This is version 1.0 of the entry. See complete history. 


Literature

Targeting a neoantigen derived from a common TP53 mutation.

Hsiue, E.H., Wright, K.M., Douglass, J., Hwang, M.S., Mog, B.J., Pearlman, A.H., Paul, S., DiNapoli, S.R., Konig, M.F., Wang, Q., Schaefer, A., Miller, M.S., Skora, A.D., Azurmendi, P.A., Murphy, M.B., Liu, Q., Watson, E., Li, Y., Pardoll, D.M., Bettegowda, C., Papadopoulos, N., Kinzler, K.W., Vogelstein, B., Gabelli, S.B., Zhou, S.

(2021) Science 371

  • DOI: 10.1126/science.abc8697
  • Primary Citation of Related Structures:  
    6W51

  • PubMed Abstract: 

    • TP53 (tumor protein p53) is the most commonly mutated cancer driver gene, but drugs that target mutant tumor suppressor genes, such as TP53 , are not yet available. Here, we describe the identification of an antibody highly specific to the most common TP53 mutation (R175H, in which arginine at position 175 is replaced with histidine) in complex with a common human leukocyte antigen-A (HLA-A) allele on the cell surface ...

    TP53 (tumor protein p53) is the most commonly mutated cancer driver gene, but drugs that target mutant tumor suppressor genes, such as TP53 , are not yet available. Here, we describe the identification of an antibody highly specific to the most common TP53 mutation (R175H, in which arginine at position 175 is replaced with histidine) in complex with a common human leukocyte antigen-A (HLA-A) allele on the cell surface. We describe the structural basis of this specificity and its conversion into an immunotherapeutic agent: a bispecific single-chain diabody. Despite the extremely low p53 peptide-HLA complex density on the cancer cell surface, the bispecific antibody effectively activated T cells to lyse cancer cells that presented the neoantigen in vitro and in mice. This approach could in theory be used to target cancers containing mutations that are difficult to target in conventional ways.

    Organizational Affiliation: 

    Bloomberg~Kimmel Institute for Cancer Immunotherapy, Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD 21287, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MHC class I antigenA, D, G, J296Homo sapiensMutation(s): 0 
Gene Names: HLA-A
UniProt
Find proteins for A0A140T913 (Homo sapiens)
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Go to UniProtKB:  A0A140T913
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UniProt GroupA0A140T913
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB, E, H, K119Homo sapiensMutation(s): 0 
Gene Names: B2M, CDABP0092, HDCMA22P
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens)
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PHAROS:  P61769
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UniProt GroupP61769
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Cellular tumor antigen p53 peptideC, F, I, L9Homo sapiensMutation(s): 1 
Gene Names: TP53, P53
UniProt & NIH Common Fund Data Resources
Find proteins for P04637 (Homo sapiens)
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Go to UniProtKB:  P04637
PHAROS:  P04637
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UniProt GroupP04637
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Immunoglobulin heavy chain H2M, O, Q, S223Homo sapiensMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Immunoglobulin light chain H2N, P, R, T215Homo sapiensMutation(s): 0 
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4
Download Ideal Coordinates CCD File 
U [auth S]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.53 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.204 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.21α = 90
b = 123.69β = 100.36
c = 136.909γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-17
    Type: Initial release