1RAJ

Poliovirus Polymerase with a 68 residue N-terminal truncation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for proteolysis-dependent activation of the poliovirus RNA-dependent RNA polymerase.

Thompson, A.A.Peersen, O.B.

(2004) Embo J. 23: 3462-3471

  • DOI: 10.1038/sj.emboj.7600357
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The active RNA-dependent RNA polymerase of poliovirus, 3Dpol, is generated by cleavage of the 3CDpro precursor protein, a protease that has no polymerase activity despite containing the entire polymerase domain. By intentionally disrupting a known an ...

    The active RNA-dependent RNA polymerase of poliovirus, 3Dpol, is generated by cleavage of the 3CDpro precursor protein, a protease that has no polymerase activity despite containing the entire polymerase domain. By intentionally disrupting a known and persistent crystal packing interaction, we have crystallized the poliovirus polymerase in a new space group and solved the complete structure of the protein at 2.0 A resolution. It shows that the N-terminus of fully processed 3Dpol is buried in a surface pocket where it makes hydrogen bonds that act to position Asp238 in the active site. Asp238 is an essential residue that selects for the 2' OH group of substrate rNTPs, as shown by a 2.35 A structure of a 3Dpol-GTP complex. Mutational, biochemical, and structural data further demonstrate that 3Dpol activity is exquisitely sensitive to mutations at the N-terminus. This sensitivity is the result of allosteric effects where the structure around the buried N-terminus directly affects the positioning of Asp238 in the active site.


    Organizational Affiliation

    Program in Cellular and Molecular Biology, Colorado State University, Fort Collins 80523, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Genome polyprotein
A
393Poliovirus type 1 (strain Mahoney)Mutations: D387R, A378L
Find proteins for P03300 (Poliovirus type 1 (strain Mahoney))
Go to UniProtKB:  P03300
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.242 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 87.710α = 90.00
b = 87.710β = 90.00
c = 107.340γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-08-17
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description