2CKB

STRUCTURE OF THE 2C/KB/DEV8 COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of plasticity in T cell receptor recognition of a self peptide-MHC antigen.

Garcia, K.C.Degano, M.Pease, L.R.Huang, M.Peterson, P.A.Teyton, L.Wilson, I.A.

(1998) Science 279: 1166-1172


  • PubMed Abstract: 
  • The T cell receptor (TCR) inherently has dual specificity. T cells must recognize self-antigens in the thymus during maturation and then discriminate between foreign pathogens in the periphery. A molecular basis for this cross-reactivity is elucidate ...

    The T cell receptor (TCR) inherently has dual specificity. T cells must recognize self-antigens in the thymus during maturation and then discriminate between foreign pathogens in the periphery. A molecular basis for this cross-reactivity is elucidated by the crystal structure of the alloreactive 2C TCR bound to self peptide-major histocompatibility complex (pMHC) antigen H-2Kb-dEV8 refined against anisotropic 3.0 angstrom resolution x-ray data. The interface between peptide and TCR exhibits extremely poor shape complementarity, and the TCR beta chain complementarity-determining region 3 (CDR3) has minimal interaction with the dEV8 peptide. Large conformational changes in three of the TCR CDR loops are induced upon binding, providing a mechanism of structural plasticity to accommodate a variety of different peptide antigens. Extensive TCR interaction with the pMHC alpha helices suggests a generalized orientation that is mediated by the Valpha domain of the TCR and rationalizes how TCRs can effectively "scan" different peptides bound within a large, low-affinity MHC structural framework for those that provide the slight additional kinetic stabilization required for signaling.


    Related Citations: 
    • An Alphabeta T Cell Receptor Structure at 2.5 A and its Orientation in the Tcr-Mhc Complex
      Garcia, K.C.,Degano, M.,Stanfield, R.L.,Brunmark, A.,Jackson, M.R.,Peterson, P.A.,Teyton, L.,Wilson, I.A.
      (1996) Science 274: 209


    Organizational Affiliation

    Department of Molecular Biology and the Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA, BETA T CELL RECEPTOR
A, C
202Mus musculusMutation(s): 0 
Find proteins for P01738 (Mus musculus)
Go to UniProtKB:  P01738
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ALPHA, BETA T CELL RECEPTOR
B, D
237N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
MAJOR HISTOCOMPATIBILITY COMPLEX CLASS I MOLECULE K(B)
H, I
274Mus musculusMutation(s): 0 
Gene Names: H2-K1 (H2-K)
Find proteins for P01901 (Mus musculus)
Go to UniProtKB:  P01901
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
DEV8 PEPTIDE
P, Q
8Mus musculusMutation(s): 0 
Gene Names: Ndufa4
Find proteins for Q62425 (Mus musculus)
Go to UniProtKB:  Q62425
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
BETA-2 MICROGLOBULIN
L, M
99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Go to UniProtKB:  P01887
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.221 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 295.660α = 90.00
b = 89.960β = 90.00
c = 84.120γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
X-PLORrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-04-29
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance