1XAK

STRUCTURE OF THE SARS-CORONAVIRUS ORF7A ACCESSORY PROTEIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and intracellular targeting of the SARS-coronavirus Orf7a accessory protein.

Nelson, C.A.Pekosz, A.Lee, C.A.Diamond, M.S.Fremont, D.H.

(2005) Structure 13: 75-85

  • DOI: 10.1016/j.str.2004.10.010
  • Primary Citation of Related Structures:  
    1XAK

  • PubMed Abstract: 
  • The open reading frame (ORF) 7a of the SARS-associated coronavirus (SARS-CoV) encodes a unique type I transmembrane protein of unknown function. We have determined the 1.8 A resolution crystal structure of the N-terminal ectodomain of orf7a, revealin ...

    The open reading frame (ORF) 7a of the SARS-associated coronavirus (SARS-CoV) encodes a unique type I transmembrane protein of unknown function. We have determined the 1.8 A resolution crystal structure of the N-terminal ectodomain of orf7a, revealing a compact seven-stranded beta sandwich unexpectedly similar in fold and topology to members of the Ig superfamily. We also demonstrate that, in SARS-CoV- infected cells, the orf7a protein is expressed and retained intracellularly. Confocal microscopy studies using orf7a and orf7a/CD4 chimeras implicate the short cytoplasmic tail and transmembrane domain in trafficking of the protein within the endoplasmic reticulum and Golgi network. Taken together, our findings provide a structural and cellular framework in which to explore the role of orf7a in SARS-CoV pathogenesis.


    Organizational Affiliation

    Department of Pathology and Immunology, 660 South Euclid Avenue, St. Louis, Missouri 63110, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SARS ORF7A ACCESSORY PROTEINA83Severe acute respiratory syndrome-related coronavirusMutation(s): 0 
Gene Names: 7a
Find proteins for P59635 (Human SARS coronavirus)
Explore P59635 
Go to UniProtKB:  P59635
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.223 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.1α = 90
b = 37.1β = 90
c = 55.33γ = 120
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-10-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance