2VLD

crystal structure of a repair endonuclease from Pyrococcus abyssi


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and function of a novel endonuclease acting on branched DNA substrates.

Ren, B.Kuhn, J.Meslet-Cladiere, L.Briffotaux, J.Norais, C.Lavigne, R.Flament, D.Ladenstein, R.Myllykallio, H.

(2009) EMBO J. 28: 2479-2489

  • DOI: 10.1038/emboj.2009.192

  • PubMed Abstract: 
  • We show that Pyrococcus abyssi PAB2263 (dubbed NucS (nuclease for ss DNA) is a novel archaeal endonuclease that interacts with the replication clamp PCNA. Structural determination of P. abyssi NucS revealed a two-domain dumbbell-like structure that i ...

    We show that Pyrococcus abyssi PAB2263 (dubbed NucS (nuclease for ss DNA) is a novel archaeal endonuclease that interacts with the replication clamp PCNA. Structural determination of P. abyssi NucS revealed a two-domain dumbbell-like structure that in overall does not resemble any known protein structure. Biochemical and structural studies indicate that NucS orthologues use a non-catalytic ssDNA-binding domain to regulate the cleavage activity at another site, thus resulting into the specific cleavage at double-stranded DNA (dsDNA)/ssDNA junctions on branched DNA substrates. Both 3' and 5' extremities of the ssDNA can be cleaved at the nuclease channel that is too narrow to accommodate duplex DNA. Altogether, our data suggest that NucS proteins constitute a new family of structure-specific DNA endonucleases that are widely distributed in archaea and in bacteria, including Mycobacterium tuberculosis.


    Organizational Affiliation

    Center for Structural Biochemistry, Karolinska Institutet, NOVUM, Huddinge, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endonuclease NucS
A, B
251Pyrococcus abyssi (strain GE5 / Orsay)Mutation(s): 2 
Gene Names: nucS
EC: 3.1.-.-
Find proteins for Q9V2E8 (Pyrococcus abyssi (strain GE5 / Orsay))
Go to UniProtKB:  Q9V2E8
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.243 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 78.966α = 90.00
b = 100.688β = 90.00
c = 157.686γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2018-09-26
    Type: Data collection, Database references, Derived calculations, Source and taxonomy, Structure summary