Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 

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Structure of the Vdelta domain of a human gammadelta T-cell antigen receptor.

Li, H.Lebedeva, M.I.Llera, A.S.Fields, B.A.Brenner, M.B.Mariuzza, R.A.

(1998) Nature 391: 502-506

  • DOI: https://doi.org/10.1038/35172
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Antigen recognition by T lymphocytes is mediated by cell-surface glycoproteins known as T-cell antigen receptors (TCRs). These are composed of alpha and beta, or gamma and delta, polypeptide chains with variable (V) and constant (C) regions. In contrast to alphabeta TCRs, which recognize antigen only as peptide fragments bound to molecules of the major histocompatibility complex (MHC), gammadelta TCRs appear to recognize proteins directly, without antigen processing, and to recognize MHC molecules independently of the bound peptide. Moreover, small phosphate-containing non-peptide compounds have also been identified as ligands for certain gammadelta T cells. These studies indicate that antigen recognition by gammadelta TCRs may be fundamentally different from that by alphabeta TCRs. The three-dimensional structures of several alphabeta TCRs and TCR fragments, and their complexes with peptide-MHC or superantigens, have been determined. Here we report the crystal structure of the Vdelta domain of a human gammadelta TCR at 1.9 A resolution. A comparison with antibody and alphabeta TCR V domains reveals that the framework structure of Vdelta more closely resembles that of VH than of Valpha, Vbeta or VL (where H and L refer to heavy and light chains), whereas the relative positions and conformations of its complementarity-determining regions (CDRs) share features of both Valpha and VH. These results provide the first direct evidence that gammadelta TCRs are structurally distinct from alphabeta TCRs and, together with the observation that the CDR3 length distribution of TCR delta chains is similar to that of immunoglobulin heavy chains, are consistent with functional studies suggesting that recognition of certain antigens by gammadelta TCRs may resemble antigen recognition by antibodies.

  • Organizational Affiliation

    Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute, Rockville 20850, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
116Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for A0JD37 (Homo sapiens)
Explore A0JD37 
Go to UniProtKB:  A0JD37
GTEx:  ENSG00000256590 
Entity Groups  
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UniProt GroupA0JD37
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.94α = 90
b = 49.08β = 90
c = 61.67γ = 90
Software Package:
Software NamePurpose
MADNESdata collection
XSCALEdata scaling
X-PLORmodel building
MADNESdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-04-22
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance