5IRO

Crystal structure of a complex between the Human adenovirus type 4 E3-19K protein and MHC class molecule HLA-A2/TAX

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.259 

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This is version 1.3 of the entry. See complete history. 


Literature

Structure of the Adenovirus Type 4 (Species E) E3-19K/HLA-A2 Complex Reveals Species-Specific Features in MHC Class I Recognition.

Li, L., Santarsiero, B.D., Bouvier, M.

(2016) J Immunol 197: 1399-1407

  • DOI: 10.4049/jimmunol.1600541
  • Primary Citation of Related Structures:  
    5IRO

  • PubMed Abstract: 

    • Adenoviruses (Ads) subvert MHC class I Ag presentation and impair host anti-Ad cellular activities. Specifically, the Ad-encoded E3-19K immunomodulatory protein targets MHC class I molecules for retention within the endoplasmic reticulum of infected ...

    Adenoviruses (Ads) subvert MHC class I Ag presentation and impair host anti-Ad cellular activities. Specifically, the Ad-encoded E3-19K immunomodulatory protein targets MHC class I molecules for retention within the endoplasmic reticulum of infected cells. We report the x-ray crystal structure of the Ad type 4 (Ad4) E3-19K of species E bound to HLA-A2 at 2.64-Å resolution. Structural analysis shows that Ad4 E3-19K adopts a tertiary fold that is shared only with Ad2 E3-19K of species C. A comparative analysis of the Ad4 E3-19K/HLA-A2 structure with our x-ray structure of Ad2 E3-19K/HLA-A2 identifies species-specific features in HLA-A2 recognition. Our analysis also reveals common binding characteristics that explain the promiscuous, and yet high-affinity, association of E3-19K proteins with HLA-A and HLA-B molecules. We also provide structural insights into why E3-19K proteins do not associate with HLA-C molecules. Overall, our study provides new information about how E3-19K proteins selectively engage with MHC class I to abrogate Ag presentation and counteract activation of CD8(+) T cells. The significance of MHC class I Ag presentation for controlling viral infections, as well as the threats of viral infections in immunocompromised patients, underline our efforts to characterize viral immunoevasins, such as E3-19K.

    Organizational Affiliation: 

    Department of Microbiology and Immunology, College of Medicine, University of Illinois, Chicago, IL 60612; mbouvier@uic.edu.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-2 alpha chainA, E, I, M, Q, U275Homo 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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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TAX proteinB, F, J, N, R, V9Human T-cell leukemia virus type IMutation(s): 0 
Find proteins for P14079 (Human T-cell leukemia virus 1 (isolate Caribbea HS-35 subtype A))
Explore P14079 
Go to UniProtKB:  P14079
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinC, G, K, O, S, W100Homo sapiensMutation(s): 0 
Gene Names: B2M, 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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(by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
E3 19 kDa proteinD, H, L, P, T, X108Human adenovirus E4Mutation(s): 0 
Gene Names: E3, HAdVE_gp12
Find proteins for Q8BEL5 (Human adenovirus E serotype 4)
Explore Q8BEL5 
Go to UniProtKB:  Q8BEL5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.259 
  • Space Group: P 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 165.727α = 90
b = 165.727β = 90
c = 122.858γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-03-14 
  • Released Date: 2016-08-24 
    • Deposition Author(s): Li, L., Bouvier, M.
Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01 AI108546

Revision History 

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2017-09-06
    Changes: Author supporting evidence, Derived calculations
  • Version 1.2: 2017-11-01
    Changes: Author supporting evidence
  • Version 1.3: 2019-12-11
    Changes: Author supporting evidence