3MRO

Crystal Structure of MHC class I HLA-A2 molecule complexed with Melan-A MART1 decapeptide variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Analysis of Relationships between Peptide/MHC Structural Features and Naive T Cell Frequency in Humans.

Reiser, J.B.Legoux, F.Gras, S.Trudel, E.Chouquet, A.Leger, A.Le Gorrec, M.Machillot, P.Bonneville, M.Saulquin, X.Housset, D.

(2014) J.Immunol. 193: 5816-5826

  • DOI: 10.4049/jimmunol.1303084
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The structural rules governing peptide/MHC (pMHC) recognition by T cells remain unclear. To address this question, we performed a structural characterization of several HLA-A2/peptide complexes and assessed in parallel their antigenicity, by analyzin ...

    The structural rules governing peptide/MHC (pMHC) recognition by T cells remain unclear. To address this question, we performed a structural characterization of several HLA-A2/peptide complexes and assessed in parallel their antigenicity, by analyzing the frequency of the corresponding Ag-specific naive T cells in A2(+) and A2(-) individuals, as well as within CD4(+) and CD8(+) subsets. We were able to find a correlation between specific naive T cell frequency and peptide solvent accessibility and/or mobility for a subset of moderately prominent peptides. However, one single structural parameter of the pMHC complexes could not be identified to explain each peptide antigenicity. Enhanced pMHC antigenicity was associated with both highly biased TRAV usage, possibly reflecting favored interaction between particular pMHC complexes and germline TRAV loops, and peptide structural features allowing interactions with a broad range of permissive CDR3 loops. In this context of constrained TCR docking mode, an optimal peptide solvent exposed surface leading to an optimal complementarity with TCR interface may constitute one of the key features leading to high frequency of specific T cells. Altogether our results suggest that frequency of specific T cells depends on the fine-tuning of several parameters, the structural determinants governing TCR-pMHC interaction being just one of them.


    Organizational Affiliation

    Université de Grenoble Alpes, Institut de Biologie Structurale, F-38044 Grenoble, France; Commissariat à l'énergie atomique et aux énergies alternatives, Direction des sciences du vivant, Institut de Biologie Structurale, F-38044 Grenoble, France; Centre national de la recherche scientifique, Institut de Biologie Structurale, F-38044 Grenoble, France;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A
293Homo sapiensMutation(s): 1 
Gene Names: HLA-A (HLAA)
Find proteins for P01892 (Homo sapiens)
Go to Gene View: HLA-A
Go to UniProtKB:  P01892
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
100Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
10-meric peptide from Melanoma antigen recognized by T-cells 1
P
10Homo sapiensMutation(s): 1 
Gene Names: MLANA (MART1)
Find proteins for Q16655 (Homo sapiens)
Go to Gene View: MLANA
Go to UniProtKB:  Q16655
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 53.881α = 90.00
b = 81.076β = 113.80
c = 57.276γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
XSCALEdata scaling
XDSdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2015-01-28
    Type: Database references