4NT6

HLA-C*0801 Crystal Structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

The immunodominant Influenza A virus M1<58-66> CTL epitope exhibits degenerate class I MHC restriction in humans

Choo, J.A.Liu, J.X.Toh, X.Y.Grotenbreg, G.M.Ren, E.C.

(2014) J.Virol. --: --

  • DOI: 10.1128/JVI.00855-14

  • PubMed Abstract: 
  • Cytotoxic T lymphocytes recognizing conserved peptide epitopes are crucial for protection against influenza A virus (IAV) infection. The CD8 T cell response against the M158-66 (GILGFVFTL) matrix protein epitope is immunodominant when restricted by H ...

    Cytotoxic T lymphocytes recognizing conserved peptide epitopes are crucial for protection against influenza A virus (IAV) infection. The CD8 T cell response against the M158-66 (GILGFVFTL) matrix protein epitope is immunodominant when restricted by HLA-A*02, a major histocompatibility complex (MHC) molecule expressed by approximately half of the human population. Here we report that the GILGFVFTL peptide is restricted by multiple HLA-C*08 alleles as well. We observed that M158-66 was able to elicit cytotoxic T lymphocyte (CTL) responses in both HLA-A*02- and HLA-C*08-positive individuals and that GILGFVFTL-specific CTLs in individuals expressing both restriction elements were distinct and not cross-reactive. The crystal structure of GILGFVFTL-HLA-C*08:01 was solved at 1.84 Å, and comparison with the known GILGFVFTL-HLA-A*02:01 structure revealed that the antigen bound both complexes in near-identical conformations, accommodated by binding pockets shaped from shared as well as unique residues. This discovery of degenerate peptide presentation by both HLA-A and HLA-C allelic variants eliciting unique CTL responses to IAV infection contributes fundamental knowledge with important implications for vaccine development strategies.


    Organizational Affiliation

    Singapore Immunology Network, A*STAR, Singapore.,Department of Microbiology, National University of Singapore, Singapore Immunology Programme, National University of Singapore, Singapore.,Department of Microbiology, National University of Singapore, Singapore Singapore Immunology Network, A*STAR, Singapore grotenbreg@nus.edu.sg ren_ee_chee@immunol.a-star.edu.sg.,Department of Microbiology, National University of Singapore, Singapore Department of Biological Sciences, National University of Singapore, Singapore Immunology Programme, National University of Singapore, Singapore grotenbreg@nus.edu.sg ren_ee_chee@immunol.a-star.edu.sg.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, Cw-8 alpha chain
A
274Homo sapiensMutation(s): 0 
Gene Names: HLA-C (HLAC)
Find proteins for P10321 (Homo sapiens)
Go to Gene View: HLA-C
Go to UniProtKB:  P10321
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
99Homo 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
Matrix protein 1
C
9Influenza A virusMutation(s): 0 
Gene Names: M1
Find proteins for D9J353 (Influenza A virus)
Go to UniProtKB:  D9J353
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.180 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 94.401α = 90.00
b = 75.687β = 120.29
c = 61.880γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
PROTEUM PLUSdata scaling
REFMACrefinement
PROTEUM PLUSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-23
    Type: Initial release