2FXQ

Single-stranded DNA-binding protein from Thermus aquaticus

• PDB DOI: https://doi.org/10.2210/pdb2FXQ/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Thermus aquaticus
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2006-02-06 Released: 2006-02-14 
• Deposition Author(s): Dauter, Z., Jedrzejczak, R., Dauter, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.247 
• R-Value Work: 0.189 
• R-Value Observed: 0.192 

Literature

Structure of the single-stranded DNA-binding protein SSB from Thermus aquaticus.

Jedrzejczak, R., Dauter, M., Dauter, Z., Olszewski, M., Kur, J.

(2006) Acta Crystallogr D Biol Crystallogr 62: 1407-1412

• PubMed: 17057346 
• DOI: https://doi.org/10.1107/S0907444906036031
• Primary Citation of Related Structures:  
  2FXQ


• PubMed Abstract: 
  

  The crystal structure of the single-stranded DNA-binding protein from Thermus aquaticus has been solved and refined at 1.85 A resolution. Two monomers, each encompassing two oligonucleotide/oligosaccharide-binding (OB) domains and a number of flexible beta-hairpin loops, form an oligomer of approximate D(2) symmetry typical of bacterial SSBs. Comparison with other SSB structures confirms considerable variability in the mode of oligomerization and aggregation of SSB oligomers.

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Organizational Affiliation: 

Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Argonne, IL 60439, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 30.07 kDa 
• Atom Count: 1,682 
• Modelled Residue Count: 197 
• Deposited Residue Count: 264 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Single-strand binding protein	A	264	Thermus aquaticus	Mutation(s): 0  Gene Names: ssb
UniProt
Find proteins for Q9KH06 (Thermus aquaticus) Explore Q9KH06  Go to UniProtKB:  Q9KH06

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.247 
• R-Value Work: 0.189 
• R-Value Observed: 0.192 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.14	α = 90
b = 163.77	β = 90
c = 60.16	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-02-14 
Deposition Author(s): Dauter, Z., Jedrzejczak, R., Dauter, M.

Revision History  

• Version 1.0: 2006-02-14
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references