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 
  • R-Value Observed: 0.183 

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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
  • Primary Citation of Related Structures:  
    4NT6

  • 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

    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.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, Cw-8 alpha chainA274Homo sapiensMutation(s): 0 
Gene Names: HLA-CHLAC
Find proteins for P10321 (Homo sapiens)
Explore P10321 
Go to UniProtKB:  P10321
NIH Common Fund Data Resources
PHAROS  P10321
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB99Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Matrix protein 1C9Influenza A virus (A/Boston/115JC/2009(H1N1))Mutation(s): 0 
Gene Names: M1
Find proteins for D9J353 (Influenza A virus)
Explore D9J353 
Go to UniProtKB:  D9J353
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.183 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.401α = 90
b = 75.687β = 120.29
c = 61.88γ = 90
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
PROTEUM PLUSdata reduction
PROTEUM PLUSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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