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 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

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

  • 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. A ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A, D
275Homo sapiensMutation(s): 0 
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, E
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
Protein Tax-1
C, F
9Human T-cell leukemia virus 1Mutation(s): 0 
Gene Names: tax
Find proteins for P0C213 (Human T-cell leukemia virus 1)
Go to UniProtKB:  P0C213
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Early E3 18.5 kDa glycoprotein
G, H
100Human adenovirus C serotype 6Mutation(s): 0 
Find proteins for P68979 (Human adenovirus C serotype 6)
Go to UniProtKB:  P68979
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.210 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 113.190α = 90.00
b = 133.670β = 90.00
c = 196.720γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
HKL-2000data reduction
HKL-2000data collection
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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