3MTV

The Crystal Structure of the PRRSV Nonstructural Protein Nsp1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The crystal structure of porcine reproductive and respiratory syndrome virus nonstructural protein Nsp1beta reveals a novel metal-dependent nuclease

Xue, F.Sun, Y.N.Yan, L.M.Zhao, C.Chen, J.Bartlam, M.Li, X.M.Lou, Z.Y.Rao, Z.H.

(2010) J.Virol. 84: 6461-6471

  • DOI: 10.1128/JVI.00301-10

  • PubMed Abstract: 
  • Porcine reproductive and respiratory syndrome virus (PRRSV), a member of the Arteriviridae family of Nidovirales, is the causative agent of porcine reproductive and respiratory syndrome, which results in enormous economic losses in the swine industry ...

    Porcine reproductive and respiratory syndrome virus (PRRSV), a member of the Arteriviridae family of Nidovirales, is the causative agent of porcine reproductive and respiratory syndrome, which results in enormous economic losses in the swine industry. As the second protein encoded by the PRRSV genome, nsp1beta cleaves itself from the downstream nsp2 protein via a C-terminal papain-like cysteine protease (PCP) domain. Although nsp1beta is known to be involved in virulence, its precise role in the process of viral infection remains unclear. In this work, we describe the homodimeric crystal structure of PRRSV nsp1beta in its natural, self-processed form. We show that the architecture of its N-terminal domain (NTD) adopts a fold closely resembling that of several known nucleases and has intrinsic nuclease activity that is strongly activated by manganese ions in vitro. Key features, however, distinguish nsp1beta from characterized nucleases, including the C-terminal PCP domain (which is responsible for the self-release of nsp1beta from nsp2), a linker domain (LKD) that connects the NTD and the PCP domain, and a C-terminal extension (CTE) that binds to and is stabilized by the putative substrate binding site of the PCPbeta domain. Combined with the reported nuclear localization of this protein, these results shed light on the self-processing mode and precise biological function of nsp1beta and thus offer a multitarget template for future drug discovery.


    Organizational Affiliation

    Structural Biology Laboratory, Tsinghua University, Beijing 100084, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Papain-like cysteine protease
A
203Porcine reproductive and respiratory syndrome virusMutation(s): 0 
Find proteins for B2ZAB4 (Porcine reproductive and respiratory syndrome virus)
Go to UniProtKB:  B2ZAB4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.201 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 100.895α = 90.00
b = 100.895β = 90.00
c = 81.685γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
ADSCdata collection
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance