4G0A

Crystallographic Analysis of Rotavirus NSP2-RNA Complex Reveals Specific Recognition of 5'-GG Sequence for RTPase activity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.0995 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic Analysis of Rotavirus NSP2-RNA Complex Reveals Specific Recognition of 5' GG Sequence for RTPase Activity.

Hu, L.Chow, D.C.Patton, J.T.Palzkill, T.Estes, M.K.Prasad, B.V.

(2012) J.Virol. 86: 10547-10557

  • DOI: 10.1128/JVI.01201-12
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Rotavirus nonstructural protein NSP2, a functional octamer, is critical for the formation of viroplasms, which are exclusive sites for replication and packaging of the segmented double-stranded RNA (dsRNA) rotavirus genome. As a component of replicat ...

    Rotavirus nonstructural protein NSP2, a functional octamer, is critical for the formation of viroplasms, which are exclusive sites for replication and packaging of the segmented double-stranded RNA (dsRNA) rotavirus genome. As a component of replication intermediates, NSP2 is also implicated in various replication-related activities. In addition to sequence-independent single-stranded RNA-binding and helix-destabilizing activities, NSP2 exhibits monomer-associated nucleoside and 5' RNA triphosphatase (NTPase/RTPase) activities that are mediated by a conserved H225 residue within a narrow enzymatic cleft. Lack of a 5' γ-phosphate is a common feature of the negative-strand RNA [(-)RNA] of the packaged dsRNA segments in rotavirus. Strikingly, all (-)RNAs (of group A rotaviruses) have a 5' GG dinucleotide sequence. As the only rotavirus protein with 5' RTPase activity, NSP2 is implicated in the removal of the γ-phosphate from the rotavirus (-)RNA. To understand how NSP2, despite its sequence-independent RNA-binding property, recognizes (-)RNA to hydrolyze the γ-phosphate within the catalytic cleft, we determined a crystal structure of NSP2 in complex with the 5' consensus sequence of minus-strand rotavirus RNA. Our studies show that the 5' GG of the bound oligoribonucleotide interacts extensively with highly conserved residues in the NSP2 enzymatic cleft. Although these residues provide GG-specific interactions, surface plasmon resonance studies suggest that the C-terminal helix and other basic residues outside the enzymatic cleft account for sequence-independent RNA binding of NSP2. A novel observation from our studies, which may have implications in viroplasm formation, is that the C-terminal helix of NSP2 exhibits two distinct conformations and engages in domain-swapping interactions, which result in the formation of NSP2 octamer chains.


    Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Non-structural protein 2
A, B, C, D
317Rotavirus A (strain RVA/SA11-Ramig/G3P[X])Mutation(s): 0 
EC: 3.6.4.-
Find proteins for Q03243 (Rotavirus A (strain RVA/SA11-Ramig/G3P[X]))
Go to UniProtKB:  Q03243
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(P*GP*GP*U)-3')E,F,G,H3synthetic construct
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A, B, C, D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.0995 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.174 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 107.690α = 90.00
b = 107.690β = 90.00
c = 272.211γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-3000data collection
PHENIXrefinement
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-07-09 
  • Released Date: 2012-08-22 
  • Deposition Author(s): Hu, L., Prasad, B.V.V.

Revision History 

  • Version 1.0: 2012-08-22
    Type: Initial release
  • Version 1.1: 2012-08-29
    Type: Derived calculations
  • Version 1.2: 2012-09-26
    Type: Database references