4E5X

Crystal structure of a complex between the human adenovirus type 2 E3-19K protein and MHC class I molecule HLA-A2/Tax

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.217 

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Literature

Crystal structure of adenovirus E3-19K bound to HLA-A2 reveals mechanism for immunomodulation.

Li, L., Muzahim, Y., Bouvier, M.

(2012) Nat Struct Mol Biol 19: 1176-1181

  • DOI: 10.1038/nsmb.2396
  • Primary Citation of Related Structures:  
    4E5X

  • PubMed Abstract: 

    • E3-19K binds to and retains MHC class I molecules in the endoplasmic reticulum, suppressing anti-adenovirus activities of T cells. We determined the structure of the adenovirus serotype 2 (Ad2, species C) E3-19K-HLA-A2 complex to 1.95-Å resolution. Ad2 E3-19K binds to the N terminus of the HLA-A2 groove, contacting the α1, α2 and α3 domains and β(2)m ...

    E3-19K binds to and retains MHC class I molecules in the endoplasmic reticulum, suppressing anti-adenovirus activities of T cells. We determined the structure of the adenovirus serotype 2 (Ad2, species C) E3-19K-HLA-A2 complex to 1.95-Å resolution. Ad2 E3-19K binds to the N terminus of the HLA-A2 groove, contacting the α1, α2 and α3 domains and β(2)m. Ad2 E3-19K has a unique structure comprising a large N-terminal domain, formed by two partially overlapping β-sheets arranged in a V shape, and a C-terminal α-helix and tail. The structure reveals determinants in E3-19K and HLA-A2 that are important for complex formation; conservation of some of these determinants in E3-19K proteins of different species and MHC I molecules of different loci suggests a universal binding mode for all E3-19K proteins. Our structure is important for understanding the immunomodulatory function of E3-19K.

    Organizational Affiliation: 

    Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, Illinois USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-2 alpha chain A, D275Homo sapiensMutation(s): 0 
Gene Names: HLA-A, HLAA
Find proteins for P04439 (Homo sapiens)
Explore P04439 
Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS:  P04439
GTEx:  ENSG00000206503
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulin B, E100Homo sapiensMutation(s): 0 
Gene Names: B2M, Beta-2-M, CDABP0092, HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS:  P61769
GTEx:  ENSG00000166710
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein Tax-1 C, F9Human T-cell lymphotropic virus type 1 (african isolate)Mutation(s): 0 
Gene Names: tax
Find proteins for P0C213 (Human T-cell leukemia virus 1 (isolate Zaire EL subtype B))
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Go to UniProtKB:  P0C213
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Early E3 18.5 kDa glycoprotein G, H100Human adenovirus 6Mutation(s): 0 
Find proteins for P68979 (Human adenovirus C serotype 6)
Explore P68979 
Go to UniProtKB:  P68979
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.217 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.19α = 90
b = 133.67β = 90
c = 196.72γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
AMoREphasing
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2012-03-14 
  • Released Date: 2012-10-10 
    • Deposition Author(s): Li, L., Bouvier, M.

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-10
    Type: Initial release
  • Version 1.1: 2012-11-21
    Changes: Database references