3TS3

Crystal structure of the projection domain of the turkey astrovirus capsid protein at 1.5 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the avian astrovirus capsid spike.

DuBois, R.M.Freiden, P.Marvin, S.Reddivari, M.Heath, R.J.White, S.W.Schultz-Cherry, S.

(2013) J Virol 87: 7853-7863

  • DOI: 10.1128/JVI.03139-12
  • Primary Citation of Related Structures:  
    3TS3

  • PubMed Abstract: 
  • Astroviruses are small, nonenveloped, single-stranded RNA viruses that cause diarrhea in a wide variety of mammals and birds. On the surface of the viral capsid are globular spikes that are thought to be involved in attachment to host cells. To understand the basis of species specificity, we investigated the structure of an avian astrovirus capsid spike and compared it to a previously reported human astrovirus capsid spike structure ...

    Astroviruses are small, nonenveloped, single-stranded RNA viruses that cause diarrhea in a wide variety of mammals and birds. On the surface of the viral capsid are globular spikes that are thought to be involved in attachment to host cells. To understand the basis of species specificity, we investigated the structure of an avian astrovirus capsid spike and compared it to a previously reported human astrovirus capsid spike structure. Here we report the crystal structure of the turkey astrovirus 2 (TAstV-2) capsid surface spike domain, determined to 1.5-Å resolution, and identify three conserved patches on the surface of the spike that are candidate avian receptor-binding sites. Surprisingly, the overall TAstV-2 capsid spike structure is unique, with only distant structural similarities to the human astrovirus capsid spike and other viral capsid spikes. There is an absence of conserved putative receptor-binding sites between the human and avian spikes. However, there is evidence for carbohydrate-binding sites in both human and avian spikes, and studies with human astrovirus 1 (HAstV-1) suggest a minor role in infection for chondroitin sulfate but not heparin. Overall, our structural and functional studies provide new insights into astrovirus host cell entry, species specificity, and evolution.


    Organizational Affiliation

    Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Capsid polyprotein ABCD208Turkey astrovirus 2Mutation(s): 0 
Gene Names: ORF2
Find proteins for Q9Q3G5 (Turkey astrovirus 2)
Explore Q9Q3G5 
Go to UniProtKB:  Q9Q3G5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.487α = 90
b = 127.878β = 104.49
c = 71.007γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
SERGUIdata collection
HKL-2000data reduction
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-28
    Type: Initial release
  • Version 1.1: 2013-07-17
    Changes: Database references
  • Version 1.2: 2014-01-15
    Changes: Database references