3CVH

How TCR-like antibody recognizes MHC-bound peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1074/jbc.M804996200
  • Primary Citation of Related Structures:  

  • 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 majo ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
H-2 class I histocompatibility antigen, K-B alpha chain
A, M
274Mus musculusMutation(s): 0 
Gene Names: H2-K1 (H2-K)
Find proteins for P01901 (Mus musculus)
Go to UniProtKB:  P01901
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B, N
99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Go to UniProtKB:  P01887
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ovalbumin
C, O
8Gallus gallusMutation(s): 0 
Gene Names: SERPINB14
Find proteins for P01012 (Gallus gallus)
Go to UniProtKB:  P01012
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
25-D1.16 heavy chain
H, Q
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
25-D1.16 light chain
L, R
209N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.219 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 80.570α = 90.00
b = 111.345β = 90.00
c = 219.087γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
PDB_EXTRACTdata extraction
PHASERphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-09-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description