1X2I

Crystal Structure Of Archaeal Xpf/Mus81 Homolog, Hef From Pyrococcus Furiosus, Helix-hairpin-helix Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.223 

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This is version 1.2 of the entry. See complete history


Literature

Structural and Functional Analyses of an Archaeal XPF/Rad1/Mus81 Nuclease: Asymmetric DNA Binding and Cleavage Mechanisms

Nishino, T.Komori, K.Ishino, Y.Morikawa, K.

(2005) Structure 13: 1183-1192

  • DOI: 10.1016/j.str.2005.04.024
  • Primary Citation of Related Structures:  
    1X2I

  • PubMed Abstract: 
  • XPF/Rad1/Mus81/Hef proteins recognize and cleave branched DNA structures. XPF and Rad1 proteins cleave the 5' side of nucleotide excision repair bubble, while Mus81 and Hef cleave similar sites of the nicked Holliday junction, fork, or flap structure ...

    XPF/Rad1/Mus81/Hef proteins recognize and cleave branched DNA structures. XPF and Rad1 proteins cleave the 5' side of nucleotide excision repair bubble, while Mus81 and Hef cleave similar sites of the nicked Holliday junction, fork, or flap structure. These proteins all function as dimers and consist of catalytic and helix-hairpin-helix DNA binding (HhH) domains. We have determined the crystal structure of the HhH domain of Pyrococcus furiosus Hef nuclease (HefHhH), which revealed the distinct mode of protein dimerization. Our structural and biochemical analyses also showed that each of the catalytic and HhH domains binds to distinct regions within the fork-structured DNA: each HhH domain from two separate subunits asymmetrically binds to the arm region, while the catalytic domain binds near the junction center. Upon binding to DNA, Hef nuclease disrupts base pairs near the cleavage site. It is most likely that this bipartite binding mode is conserved in the XPF/Rad1/Mus81 nuclease family.


    Organizational Affiliation

    Department of Structural Biology, Biomolecular Engineering Research Institute, 6-2-3 Furuedai, Suita, Osaka 565-0874, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hef helicase/nucleaseAB75Pyrococcus furiosusMutation(s): 0 
Gene Names: PF2015
Find proteins for Q8TZH8 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8TZH8 
Go to UniProtKB:  Q8TZH8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.942α = 90
b = 56.889β = 90
c = 68.371γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-09-13
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance