1TQL

POLIOVIRUS POLYMERASE G1A MUTANT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.237 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.5 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: https://doi.org/10.1038/sj.emboj.7600357
  • Primary Citation of Related Structures:  
    1RA6, 1RA7, 1RAJ, 1TQL

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-directed RNA polymerase461Poliovirus 1Mutation(s): 7 
Gene Names: 3D
EC: 2.7.7.48
UniProt
Find proteins for P03300 (Poliovirus type 1 (strain Mahoney))
Explore P03300 
Go to UniProtKB:  P03300
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03300
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.237 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.78α = 90
b = 127.78β = 90
c = 113.265γ = 120
Software Package:
Software NamePurpose
d*TREKdata reduction
CNSrefinement
d*TREKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.5: 2023-08-23
    Changes: Data collection, Refinement description