4IDH

Crystal Structure of the large terminase subunit gp2 of bacterial virus Sf6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structures of the phage Sf6 large terminase provide new insights into DNA translocation and cleavage.

Zhao, H.Christensen, T.E.Kamau, Y.N.Tang, L.

(2013) Proc.Natl.Acad.Sci.USA 110: 8075-8080

  • DOI: 10.1073/pnas.1301133110
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Many DNA viruses use powerful molecular motors to cleave concatemeric viral DNA into genome-length units and package them into preformed procapsid powered by ATP hydrolysis. Here we report the structures of the DNA-packaging motor gp2 of bacteriophag ...

    Many DNA viruses use powerful molecular motors to cleave concatemeric viral DNA into genome-length units and package them into preformed procapsid powered by ATP hydrolysis. Here we report the structures of the DNA-packaging motor gp2 of bacteriophage Sf6, which reveal a unique clade of RecA-like ATPase domain and an RNase H-like nuclease domain tethered by a regulatory linker domain, exhibiting a strikingly distinct domain arrangement. The gp2 structures complexed with nucleotides reveal, at the atomic detail, the catalytic center embraced by the ATPase domain and the linker domain. The gp2 nuclease activity is modulated by the ATPase domain and is stimulated by ATP. An extended DNA-binding surface is formed by the linker domain and the nuclease domain. These results suggest a unique mechanism for translation of chemical reaction into physical motion of DNA and provide insights into coordination of DNA translocation and cleavage in a viral DNA-packaging motor, which may be achieved via linker-domain-mediated interdomain communication driven by ATP hydrolysis.


    Organizational Affiliation

    Department of Molecular Biosciences, University of Kansas, Lawrence, KS 66045, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gene 2 protein
A
490Shigella phage Sf6Mutation(s): 0 
Gene Names: 2
Find proteins for Q716H3 (Shigella phage Sf6)
Go to UniProtKB:  Q716H3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 57.790α = 90.00
b = 63.440β = 90.00
c = 150.730γ = 90.00
Software Package:
Software NamePurpose
PHASESphasing
JBluIce-EPICSdata collection
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-01
    Type: Initial release
  • Version 1.1: 2013-05-15
    Type: Database references
  • Version 1.2: 2013-05-29
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description