1MBM

NSP4 proteinase from Equine Arteritis Virus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of Arterivirus nsp4: the smallest chymotrypsin-like proteinase with an alpha/beta C-terminal extension and alternate conformations of the oxyanion hole

Barrette-Ng, I.H.Ng, K.K.-S.Mark, B.L.van Aken, D.Cherney, M.M.Garen, C.Kolodenko, Y.Gorbalenya, A.E.Snijder, E.J.James, M.N.G.

(2002) J Biol Chem 277: 39960-39966

  • DOI: 10.1074/jbc.M206978200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Arteriviruses are enveloped, positive-stranded RNA viruses and include pathogens of major economic concern to the swine- and horse-breeding industries. The arterivirus replicase gene encodes two large precursor polyproteins that are processed by the ...

    Arteriviruses are enveloped, positive-stranded RNA viruses and include pathogens of major economic concern to the swine- and horse-breeding industries. The arterivirus replicase gene encodes two large precursor polyproteins that are processed by the viral main proteinase nonstructural protein 4 (nsp4). The three-dimensional structure of the 21-kDa nsp4 from the arterivirus prototype equine arteritis virus has been determined to 2.0 A resolution. Nsp4 adopts the smallest known chymotrypsin-like fold with a canonical catalytic triad of Ser-120, His-39, and Asp-65, as well as a novel alpha/beta C-terminal extension domain that may play a role in mediating protein-protein interactions. In different copies of nsp4 in the asymmetric unit, the oxyanion hole adopts either a collapsed inactive conformation or the standard active conformation, which may be a novel way of regulating proteolytic activity.


    Organizational Affiliation

    Canadian Institutes for Health Research Group in Protein Structure and Function, Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
chymotrypsin-like serine proteaseA, B, C, D198Equine arteritis virusMutation(s): 0 
Gene Names: NSP4
EC: 3.4.21 (PDB Primary Data), 3.4.22 (UniProt), 3.4.19.12 (UniProt), 2.7.7.48 (UniProt), 3.6.4.12 (UniProt), 3.6.4.13 (UniProt)
Find proteins for P19811 (Equine arteritis virus (strain Bucyrus))
Explore P19811 
Go to UniProtKB:  P19811
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.612α = 74.08
b = 60.326β = 63.3
c = 62.637γ = 66.18
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-23
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation