2P24

I-Au/MBP125-135


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A new twist in TCR diversity revealed by a forbidden alphabeta TCR.

McBeth, C.Seamons, A.Pizarro, J.C.Fleishman, S.J.Baker, D.Kortemme, T.Goverman, J.M.Strong, R.K.

(2008) J.Mol.Biol. 375: 1306-1319

  • DOI: 10.1016/j.jmb.2007.11.020
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report crystal structures of a negatively selected T cell receptor (TCR) that recognizes two I-A(u)-restricted myelin basic protein peptides and one of its peptide/major histocompatibility complex (pMHC) ligands. Unusual complementarity-determinin ...

    We report crystal structures of a negatively selected T cell receptor (TCR) that recognizes two I-A(u)-restricted myelin basic protein peptides and one of its peptide/major histocompatibility complex (pMHC) ligands. Unusual complementarity-determining region (CDR) structural features revealed by our analyses identify a previously unrecognized mechanism by which the highly variable CDR3 regions define ligand specificity. In addition to the pMHC contact residues contributed by CDR3, the CDR3 residues buried deep within the V alpha/V beta interface exert indirect effects on recognition by influencing the V alpha/V beta interdomain angle. This phenomenon represents an additional mechanism for increasing the potential diversity of the TCR repertoire. Both the direct and indirect effects exerted by CDR residues can impact global TCR/MHC docking. Analysis of the available TCR structures in light of these results highlights the significance of the V alpha/V beta interdomain angle in determining specificity and indicates that TCR/pMHC interface features do not distinguish autoimmune from non-autoimmune class II-restricted TCRs.


    Organizational Affiliation

    Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
H-2 class II histocompatibility antigen, A-U alpha chain
A
236Mus musculusMutation(s): 0 
Gene Names: H2-Aa
Find proteins for P14438 (Mus musculus)
Go to UniProtKB:  P14438
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
H-2 class II histocompatibility antigen, A-U beta chain
B
259Mus musculusMutation(s): 0 
Find proteins for P06344 (Mus musculus)
Go to UniProtKB:  P06344
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.209 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 103.656α = 90.00
b = 103.656β = 90.00
c = 97.246γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
AMoREphasing
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance