1O7I

Crystal structure of a single stranded DNA binding protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Insights Into Ssdna Recognition by the Ob Fold from a Structural and Thermodynamic Study of Sulfolobus Ssb Protein

Kerr, I.D.Wadsworth, R.I.M.Cubeddu, L.Blankenfeldt, W.Naismith, J.H.White, M.F.

(2003) Embo J. 22: 2561

  • DOI: 10.1093/emboj/cdg272

  • PubMed Abstract: 
  • Information processing pathways such as DNA replication are conserved in eukaryotes and archaea and are significantly different from those found in bacteria. Single-stranded DNA-binding (SSB) proteins (or replication protein A, RPA, in eukaryotes) pl ...

    Information processing pathways such as DNA replication are conserved in eukaryotes and archaea and are significantly different from those found in bacteria. Single-stranded DNA-binding (SSB) proteins (or replication protein A, RPA, in eukaryotes) play a central role in many of these pathways. However, whilst euryarchaea have a eukaryotic-type RPA homologue, crenarchaeal SSB proteins appear much more similar to the bacterial proteins, with a single OB fold for DNA binding and a flexible C-terminal tail that is implicated in protein-protein interactions. We have determined the crystal structure of the SSB protein from the crenarchaeote Sulfolobus solfataricus to 1.26 A. The structure shows a striking and unexpected similarity to the DNA-binding domains of human RPA, providing confirmation of the close relationship between archaea and eukaryotes. The high resolution of the structure, together with thermodynamic and mutational studies of DNA binding, allow us to propose a molecular basis for DNA binding and define the features required for eukaryotic and archaeal OB folds.


    Related Citations: 
    • Overexpression, Purification, Crystallization and Data Collection of a Single-Stranded DNA-Binding Protein from Sulfolobus Solfataricus
      Kerr, I.D.,Wadsworth, R.I.,Blankenfeldt, W.,Staines, A.G.,White, M.F.,Naismith, J.H.
      (2001) Acta Crystallogr.,Sect.D 57: 1290


    Organizational Affiliation

    Centre for Biomolecular Science, St Andrews University, Fife, KY16 9ST, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SINGLE STRANDED DNA BINDING PROTEIN
A, B
119Sulfolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Gene Names: ssb
Find proteins for Q97W73 (Sulfolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q97W73
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.191 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 75.805α = 90.00
b = 75.805β = 90.00
c = 70.118γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SOLVEphasing
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-25
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance