3O27

The crystal structure of C68 from the hybrid virus-plasmid pSSVx


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.252 

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This is version 1.1 of the entry. See complete history


Literature

C68 from the Sulfolobus islandicus plasmid-virus pSSVx is a novel member of the AbrB-like transcription factor family.

Contursi, P.D'Ambrosio, K.Pirone, L.Pedone, E.Aucelli, T.She, Q.De Simone, G.Bartolucci, S.

(2011) Biochem J 435: 157-166

  • DOI: 10.1042/BJ20101334
  • Primary Citation of Related Structures:  
    3O27

  • PubMed Abstract: 
  • The genetic element pSSVx from Sulfolobus islandicus, strain REY15/4, is a hybrid between a plasmid and a fusellovirus. This plasmid-virus hybrid infects several species of the hyperthermophilic acidophilic crenarchaeon Sulfolobus. The open reading frame orfc68 of pSSVx encodes a 7 ...

    The genetic element pSSVx from Sulfolobus islandicus, strain REY15/4, is a hybrid between a plasmid and a fusellovirus. This plasmid-virus hybrid infects several species of the hyperthermophilic acidophilic crenarchaeon Sulfolobus. The open reading frame orfc68 of pSSVx encodes a 7.7 kDa protein that does not show significant sequence homology with any protein with known three-dimensional structure. EMSA (electrophoretic mobility-shift assay) experiments, DNA footprinting and CD analyses indicate that recombinant C68, purified from Escherichia coli, binds to two different operator sites that are located upstream of its own promoter. The three-dimensional structure, solved by a single-wavelength anomalous diffraction experiment on a selenomethionine derivative, shows that the protein assumes a swapped-hairpin fold, which is a distinctive fold associated with a family of prokaryotic transcription factors, such as AbrB from Bacillus subtilis. Nevertheless, C68 constitutes a novel representative of this family because it shows several peculiar structural and functional features.


    Organizational Affiliation

    Dipartimento di Biologia Strutturale e Funzionale, Università degli Studi di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cinthia, Naples, Italy. contursi@unina.it



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative uncharacterized proteinA, B68Sulfolobus islandicusMutation(s): 0 
Gene Names: orfc68
Find proteins for Q9P9J8 (Sulfolobus islandicus)
Explore Q9P9J8 
Go to UniProtKB:  Q9P9J8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.252 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.72α = 90
b = 107.72β = 90
c = 107.72γ = 90
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-01-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance