4IQX

Mutant P44S P169S M296I of Foot-and-mouth disease Virus RNA-dependent RNA polymerase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

A multi-step process of viral adaptation to a mutagenic nucleoside analogue by modulation of transition types leads to extinction-escape.

Agudo, R.Ferrer-Orta, C.Arias, A.de la Higuera, I.Perales, C.Perez-Luque, R.Verdaguer, N.Domingo, E.

(2010) Plos Pathog. 6: e1001072-e1001072

  • DOI: 10.1371/journal.ppat.1001072
  • Primary Citation of Related Structures:  3NKY, 3NL0, 3NMA

  • PubMed Abstract: 
  • Resistance of viruses to mutagenic agents is an important problem for the development of lethal mutagenesis as an antiviral strategy. Previous studies with RNA viruses have documented that resistance to the mutagenic nucleoside analogue ribavirin (1- ...

    Resistance of viruses to mutagenic agents is an important problem for the development of lethal mutagenesis as an antiviral strategy. Previous studies with RNA viruses have documented that resistance to the mutagenic nucleoside analogue ribavirin (1-β-D-ribofuranosyl-1-H-1,2,4-triazole-3-carboxamide) is mediated by amino acid substitutions in the viral polymerase that either increase the general template copying fidelity of the enzyme or decrease the incorporation of ribavirin into RNA. Here we describe experiments that show that replication of the important picornavirus pathogen foot-and-mouth disease virus (FMDV) in the presence of increasing concentrations of ribavirin results in the sequential incorporation of three amino acid substitutions (M296I, P44S and P169S) in the viral polymerase (3D). The main biological effect of these substitutions is to attenuate the consequences of the mutagenic activity of ribavirin -by avoiding the biased repertoire of transition mutations produced by this purine analogue-and to maintain the replicative fitness of the virus which is able to escape extinction by ribavirin. This is achieved through alteration of the pairing behavior of ribavirin-triphosphate (RTP), as evidenced by in vitro polymerization assays with purified mutant 3Ds. Comparison of the three-dimensional structure of wild type and mutant polymerases suggests that the amino acid substitutions alter the position of the template RNA in the entry channel of the enzyme, thereby affecting nucleotide recognition. The results provide evidence of a new mechanism of resistance to a mutagenic nucleoside analogue which allows the virus to maintain a balance among mutation types introduced into progeny genomes during replication under strong mutagenic pressure.


    Organizational Affiliation

    Centro de Biologia Molecular Severo Ochoa CSIC-UAM, Cantoblanco, Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
3D polymerase
A
481Foot-and-mouth disease virus - type CN/A
Find proteins for Q9QCE4 (Foot-and-mouth disease virus - type C)
Go to UniProtKB:  Q9QCE4
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(*AP*UP*GP*GP*GP*CP*C)-3')B7synthetic construct
Entity ID: 3
MoleculeChainsLengthOrganism
RNA (5'-R(*GP*GP*CP*CP*C)-3')C5synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.222 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 93.836α = 90.00
b = 93.836β = 90.00
c = 99.867γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
ADSCdata collection
MOSFLMdata reduction
REFMACphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release