Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 119.67 kDa 
• Atom Count: 8529 
• Modelled Residue Count: 1066 
• Deposited Residue Count: 1070 
• Unique protein chains: 1

3NVA

Dimeric form of CTP synthase from Sulfolobus solfataricus

• PDB DOI: 10.2210/pdb3NVA/pdb

• Classification: LIGASE
• Organism(s): Saccharolobus solfataricus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-07-08 Released: 2010-09-08 
• Deposition Author(s): Harris, P., Willemoes, M., Lauritsen, I., Johansson, E., Jensen, K.F.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.282 
• R-Value Work: 0.207 
• R-Value Observed: 0.210 

Literature

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

• PubMed: 21301086 
• DOI: 10.1107/S1744309110052334
• Primary Citation of Related Structures:  
  3NVA


• 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.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CTP synthase	A, B	535	Saccharolobus solfataricus	Mutation(s): 0  Gene Names: pyrG, SSO0201 EC: 6.3.4.2
UniProt
Find proteins for Q980S6 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)) Explore Q980S6  Go to UniProtKB:  Q980S6

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 43.45	α = 100.99
b = 76.78	β = 95.36
c = 98.87	γ = 108.42

Software Package:

Software Name	Purpose
XSCALE	data scaling
MOLREP	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-07-08 
• Released Date: 2010-09-08 
Deposition Author(s): Harris, P., Willemoes, M., Lauritsen, I., Johansson, E., Jensen, K.F.

Revision History  

• 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