Dimeric form of CTP synthase from Sulfolobus solfataricus

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report

This is version 1.5 of the entry. See complete history


Structure of the dimeric form of CTP synthase from Sulfolobus solfataricus

Lauritsen, I.Willemoes, M.Jensen, K.F.Johansson, E.Harris, P.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 201-208

  • DOI: https://doi.org/10.1107/S1744309110052334
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    CTP synthase catalyzes the last committed step in de novo pyrimidine-nucleotide biosynthesis. Active CTP synthase is a tetrameric enzyme composed of a dimer of dimers. The tetramer is favoured in the presence of the substrate nucleotides ATP and UTP; when saturated with nucleotide, the tetramer completely dominates the oligomeric state of the enzyme. Furthermore, phosphorylation has been shown to regulate the oligomeric states of the enzymes from yeast and human. The crystal structure of a dimeric form of CTP synthase from Sulfolobus solfataricus has been determined at 2.5 Å resolution. A comparison of the dimeric interface with the intermolecular interfaces in the tetrameric structures of Thermus thermophilus CTP synthase and Escherichia coli CTP synthase shows that the dimeric interfaces are almost identical in the three systems. Residues that are involved in the tetramerization of S. solfataricus CTP synthase according to a structural alignment with the E. coli enzyme all have large thermal parameters in the dimeric form. Furthermore, they are seen to undergo substantial movement upon tetramerization.

  • Organizational Affiliation

    Department of Biology, University of Copenhagen, Copenhagen, Denmark.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CTP synthase
A, B
535Saccharolobus solfataricusMutation(s): 0 
Gene Names: pyrGSSO0201
Find proteins for Q980S6 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q980S6 
Go to UniProtKB:  Q980S6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ980S6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.45α = 100.99
b = 76.78β = 95.36
c = 98.87γ = 108.42
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
MAR345dtbdata collection
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-04-25
    Changes: Database references
  • Version 1.3: 2014-11-12
    Changes: Structure summary
  • Version 1.4: 2018-05-23
    Changes: Advisory, Data collection
  • Version 1.5: 2023-11-01
    Changes: Advisory, Data collection, Database references, Refinement description