2W9M

Structure of family X DNA polymerase from Deinococcus radiodurans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Family X DNA Polymerase from Deinococcus Radioduran Adopts a Non-Standard Extended Conformation.

Leulliot, N.Cladiere, L.Lecointe, F.Durand, D.Hubscher, U.Van Tilbeurgh, H.

(2009) J Biol Chem 284: 11992

  • DOI: 10.1074/jbc.M809342200
  • Primary Citation of Related Structures:  
    2W9M

  • PubMed Abstract: 
  • Deinococcus radiodurans is an extraordinarily radioresistant bacterium that is able to repair hundreds of radiation-induced double-stranded DNA breaks. One of the players in this pathway is an X family DNA polymerase (PolX(Dr)). Deletion of PolX(Dr) ...

    Deinococcus radiodurans is an extraordinarily radioresistant bacterium that is able to repair hundreds of radiation-induced double-stranded DNA breaks. One of the players in this pathway is an X family DNA polymerase (PolX(Dr)). Deletion of PolX(Dr) has been shown to decrease the rate of repair of double-stranded DNA breaks and increase cell sensitivity to gamma-rays. A 3'-->5' exonuclease activity that stops cutting close to DNA loops has also been demonstrated. The present crystal structure of PolX(Dr) solved at 2.46-A resolution reveals that PolX(Dr) has a novel extended conformation in stark contrast to the closed "right hand" conformation commonly observed for DNA polymerases. This extended conformation is stabilized by the C-terminal PHP domain, whose putative nuclease active site is obstructed by its interaction with the polymerase domain. The overall conformation and the presence of non standard residues in the active site of the polymerase X domain makes PolX(Dr) the founding member of a novel class of polymerases involved in DNA repair but whose detailed mode of action still remains enigmatic.


    Organizational Affiliation

    Institut de Biochimie et de Biophysique Moléculaire et Cellulaire, Université de Paris-Sud, CNRS, UMR8619, IFR115, Bât 430, Orsay 91405 Cedex, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
POLYMERASE XAB578Deinococcus radioduransMutation(s): 0 
Find proteins for Q9RX48 (Deinococcus radiodurans (strain ATCC 13939 / DSM 20539 / JCM 16871 / LMG 4051 / NBRC 15346 / NCIMB 9279 / R1 / VKM B-1422))
Explore Q9RX48 
Go to UniProtKB:  Q9RX48
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download CCD File 
A, B
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.206 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.93α = 90
b = 138.25β = 92.25
c = 67.75γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-10
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance