3CVH

How TCR-like antibody recognizes MHC-bound peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.223 

Starting Models: experimental
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This is version 1.3 of the entry. See complete history


Literature

How a T cell receptor-like antibody recognizes major histocompatibility complex-bound peptide

Mareeva, T.Martinez-Hackert, E.Sykulev, Y.

(2008) J Biol Chem 283: 29053-29059

  • DOI: https://doi.org/10.1074/jbc.M804996200
  • Primary Citation of Related Structures:  
    3CVH, 3CVI

  • PubMed Abstract: 

    We determined the crystal structures of the T cell receptor (TCR)-like antibody 25-D1.16 Fab fragment bound to a complex of SIINFEKL peptide from ovalbumin and the H-2K(b) molecule. Remarkably, this antibody directly "reads" the structure of the major histocompatibility complex (MHC)-bound peptide, employing the canonical diagonal binding mode utilized by most TCRs. This is in marked contrast with another TCR-like antibody, Hyb3, bound to melanoma peptide MAGE-A1 in association with HLA-A1 MHC class I. Hyb3 assumes a non-canonical orientation over its cognate peptide-MHC and appears to recognize a conformational epitope in which the MHC contribution is dominant. We conclude that TCR-like antibodies can recognize MHC-bound peptide via two different mechanisms: one is similar to that exploited by the preponderance of TCRs and the other requires a non-canonical antibody orientation over the peptide-MHC complex.


  • Organizational Affiliation

    Department of Microbiology and Immunology and the Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
H-2 class I histocompatibility antigen, K-B alpha chainA,
F [auth M]
274Mus musculusMutation(s): 0 
UniProt
Find proteins for P01901 (Mus musculus)
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Go to UniProtKB:  P01901
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UniProt GroupP01901
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2-microglobulinB,
G [auth N]
99Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P01887 (Mus musculus)
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Go to UniProtKB:  P01887
IMPC:  MGI:88127
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UniProt GroupP01887
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
OvalbuminC,
H [auth O]
8Gallus gallusMutation(s): 0 
UniProt
Find proteins for P01012 (Gallus gallus)
Explore P01012 
Go to UniProtKB:  P01012
Entity Groups  
UniProt GroupP01012
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
25-D1.16 heavy chainD [auth H],
I [auth Q]
219Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
25-D1.16 light chainE [auth L],
J [auth R]
209Mus musculusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.57α = 90
b = 111.345β = 90
c = 219.087γ = 90
Software Package:
Software NamePurpose
PHASERphasing
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Refinement description