2HWK

Crystal Structure of Venezuelan Equine Encephalitis Alphavirus nsP2 Protease Domain

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.208 

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This is version 1.3 of the entry. See complete history. 


Literature

The Crystal Structure of the Venezuelan Equine Encephalitis Alphavirus nsP2 Protease.

Russo, A.T., White, M.A., Watowich, S.J.

(2006) Structure 14: 1449-1458

  • DOI: 10.1016/j.str.2006.07.010
  • Primary Citation of Related Structures:  
    2HWK

  • PubMed Abstract: 

    • Alphavirus replication and propagation is dependent on the protease activity of the viral nsP2 protein, which cleaves the nsP1234 polyprotein replication complex into functional components. Thus, nsP2 is an attractive target for drug discovery efforts to combat highly pathogenic alphaviruses ...

    Alphavirus replication and propagation is dependent on the protease activity of the viral nsP2 protein, which cleaves the nsP1234 polyprotein replication complex into functional components. Thus, nsP2 is an attractive target for drug discovery efforts to combat highly pathogenic alphaviruses. Unfortunately, antiviral development has been hampered by a lack of structural information for the nsP2 protease. Here, we report the crystal structure of the nsP2 protease (nsP2pro) from Venezuelan equine encephalitis alphavirus determined at 2.45 A resolution. The protease structure consists of two distinct domains. The nsP2pro N-terminal domain contains the catalytic dyad cysteine and histidine residues organized in a protein fold that differs significantly from any known cysteine protease or protein folds. The nsP2pro C-terminal domain displays structural similarity to S-adenosyl-L-methionine-dependent RNA methyltransferases and provides essential elements that contribute to substrate recognition and may also regulate the structure of the substrate binding cleft.

    Related Citations: 
    • Structural Basis of Substrate Specificity in Venezuelan Equine Encephalitis nsP2 Protease
      Russo, A.T., White, M.A., Malmstrom, R., Watowich, S.J.
      () To be published --: --
    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biology and Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, Galveston, Texas 77555, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
helicase nsP2 A320Venezuelan equine encephalitis virus (strain TC-83)Mutation(s): 0 
Gene Names: NS
EC: 3.4.22
Find proteins for Q9WIJ1 (Venezuelan equine encephalitis virus (strain Trinidad donkey))
Explore Q9WIJ1 
Go to UniProtKB:  Q9WIJ1
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMT
Query on FMT
Download Ideal Coordinates CCD File 
A
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.47α = 90
b = 72.58β = 90
c = 106.66γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-26
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-11-12
    Changes: Structure summary