2CO5

F93 FROM STIV, a winged-helix DNA-binding protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A Winged-Helix Protein from Sulfolobus Turreted Icosahedral Virus Points Toward Stabilizing Disulfide Bonds in the Intracellular Proteins of a Hyperthermophilic Virus.

Larson, E.T.Eilers, B.Menon, S.Reiter, D.Ortmann, A.Young, M.J.Lawrence, C.M.

(2007) Virology 368: 249

  • DOI: 10.1016/j.virol.2007.06.040

  • PubMed Abstract: 
  • Sulfolobus turreted icosahedral virus (STIV) was the first non-tailed icosahedral virus to be isolated from an archaeal host. Like other archaeal viruses, its 37 open reading frames generally lack sequence similarity to genes with known function. The ...

    Sulfolobus turreted icosahedral virus (STIV) was the first non-tailed icosahedral virus to be isolated from an archaeal host. Like other archaeal viruses, its 37 open reading frames generally lack sequence similarity to genes with known function. The roles of the gene products in this and other archaeal viruses are thus largely unknown. However, a protein's three-dimensional structure may provide functional and evolutionary insight in cases of minimal sequence similarity. In this vein, the structure of STIV F93 reveals a homodimer with strong similarity to the winged-helix family of DNA-binding proteins. Importantly, an interchain disulfide bond is found at the dimer interface, prompting analysis of the cysteine distribution in the putative intracellular proteins of the viral proteome. The analysis suggests that intracellular disulfide bonds are common in cellular STIV proteins, where they enhance the thermostability of the viral proteome.


    Related Citations: 
    • The Structure of a Thermophilic Archaeal Virus Shows a Double-Stranded DNA Viral Capsid Type that Spans All Domains of Life
      Rice, G.,Tang, L.,Stedman, K.,Roberto, F.,Spuhler, J.,Gillitzer, E.,Johnson, J.E.,Douglas, T.,Young, M.
      (2004) Proc.Natl.Acad.Sci.USA 101: 7716


    Organizational Affiliation

    Thermal Biology Institute, Montana State University, Bozeman, MT 59717, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VIRAL PROTEIN F93
A, B
99Sulfolobus turreted icosahedral virus 1Mutation(s): 0 
Find proteins for Q6Q0J9 (Sulfolobus turreted icosahedral virus 1)
Go to UniProtKB:  Q6Q0J9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.190 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 42.050α = 90.00
b = 102.594β = 90.00
c = 92.398γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
RESOLVEphasing
REFMACrefinement
HKL-2000data scaling
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-31
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance