2CLZ

Mhc Class I Natural Mutant H-2Kbm8 Heavy Chain Complexed With beta-2 Microglobulin and pBM1 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Distinct Orientation of the Alloreactive Monoclonal Cd8 T Cell Activation Program by Three Different Peptide/Mhc Complexes.

Auphan-Anezin, N., Mazza, C., Guimezanes, A., Barrett-Wilt, G.A., Montero-Julian, F., Roussel, A., Hunt, D.F., Malissen, B., Schmitt-Verhulst, A.M.

(2006) Eur.J.Immunol. 36: 1856

  • DOI: 10.1002/eji.200635895
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • We have characterized three different programs of activation for alloreactive CD8 T cells expressing the BM3.3 TCR, their elicitation depending on the characteristics of the stimulating peptide/MHC complex. The high-affinity interaction between the T ...

    We have characterized three different programs of activation for alloreactive CD8 T cells expressing the BM3.3 TCR, their elicitation depending on the characteristics of the stimulating peptide/MHC complex. The high-affinity interaction between the TCR and the K(b)-associated endogenous peptide pBM1 (INFDFNTI) induced a complete differentiation program into effector cells correlated with sustained ERK activation. The K(bm8) variant elicited a partial activation program with delayed T cell proliferation, poor CTL activity and undetectable ERK phosphorylation; this resulted from a low-avidity interaction of TCR BM3.3 with a newly identified endogenous peptide, pBM8 (SQYYYNSL). Interestingly, mismatched pBM1/K(bm8) complexes induced a split response in BM3.3 T cells, with total reconstitution of T cell proliferation but defective generation of CTL activity that was correlated with strong but shortened ERK phosphorylation. Crystal structures highlight the molecular basis for the higher stability of pBM8/K(bm8) compared to pBM1/K(bm8) complexes that exist in two conformers. This study illustrates the importance of the stability of both peptide/MHC and peptide/MHC-TCR interactions for induction of sustained signaling required to induce optimal CTL effector functions. Subtle allelic structural variations, amplified by peptide selection, may thus orient distinct outcomes of alloreactive TCR-based therapies.

    Related Citations: 
    • Cdr3 Loop Flexibility Contributes to the Degeneracy of Tcr Recognition
      Reiser, J.B.,Darnault, C.,Gregoire, C.,Mosser, T.,Mazza, G.,Kearnay, A.,Van Der Merwe, P.A.,Fontecilla-Camps, J.C.,Housset, D.,Malissen, B.
      (2003) Nat.Immunol. 4: 241

    Organizational Affiliation: 

    Centre d'Immunologie de Marseille-Luminy, CNRS-INSERM-Universite de la Méditerranée, Campus de Luminy, Marseille, France. auphan@ciml.univ-mrs.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
H-2 CLASS I HISTOCOMPATIBILITY ANTIGEN, K-B ALPHA CHAIN
A, H
279Mus musculusMutation(s): 4 
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, P
99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Go to UniProtKB:  P01887
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
RBM5 PROTEIN
C, M
8Mus musculusMutation(s): 0 
Gene Names: Kctd20
Find proteins for Q8CDD8 (Mus musculus)
Go to UniProtKB:  Q8CDD8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 66.588α = 90.00
b = 90.759β = 111.35
c = 89.248γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
MOSFLMdata reduction
CNSphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance