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: 1.90 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

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:  
    2CLV, 2CLZ

  • 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 TCR and the K(b)-associated endogenous peptide pBM1 (INFDFNTI) induced a complete differentiation program into effector cells correlated with sustained ERK activation ...

    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
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
H-2 CLASS I HISTOCOMPATIBILITY ANTIGEN, K-B ALPHA CHAINA,
D [auth H]		279Mus musculusMutation(s): 4 
Gene Names: H2-K1, H2-K
UniProt
Find proteins for P01901 (Mus musculus)
Explore P01901 
Go to UniProtKB:  P01901
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UniProt GroupP01901
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BETA-2 MICROGLOBULINB,
F [auth P]		99Mus musculusMutation(s): 0 
Gene Names: B2m
UniProt & NIH Common Fund Data Resources
Find proteins for P01887 (Mus musculus)
Explore P01887 
Go to UniProtKB:  P01887
IMPC:  MGI:88127
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UniProt GroupP01887
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
RBM5 PROTEINC,
E [auth M]		8Mus musculusMutation(s): 0 
Gene Names: Kctd20
UniProt
Find proteins for Q8CDD8 (Mus musculus)
Explore Q8CDD8 
Go to UniProtKB:  Q8CDD8
Entity Groups  
UniProt GroupQ8CDD8
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.588α = 90
b = 90.759β = 111.35
c = 89.248γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

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