2IWR

Gtpase Like Domain Of Centaurin Gamma 1 (Human)

• PDB DOI: https://doi.org/10.2210/pdb2IWR/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-07-03 Released: 2006-07-04 
• Deposition Author(s): Elkins, J.M., Soundararajan, M., Yang, X., Papagrigoriou, E., Sundstrom, M., Edwards, A., Arrowsmith, C., Weigelt, J., Doyle, D.A., Structural Genomics Consortium (SGC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.214 
• R-Value Work: 0.150 
• R-Value Observed: 0.152 

Starting Model: experimental

Literature

The Centaurin Gamma-1 Gtpase-Like Domain Functions as an Ntpase.

Soundararajan, M., Yang, X., Elkins, J.M., Sobott, F., Doyle, D.A.

(2007) Biochem J 401: 679

• PubMed: 17037982 
• DOI: https://doi.org/10.1042/BJ20060555
• Primary Citation of Related Structures:  
  2BMJ, 2IWR


• PubMed Abstract: 
  

  Centaurins are a family of proteins that contain GTPase-activating protein domains, with the gamma family members containing in addition a GTPase-like domain. Centaurins reside mainly in the nucleus and are known to activate phosphoinositide 3-kinase, a key regulator of cell proliferation, motility and vesicular trafficking. In the present study, using X-ray structural analysis, enzymatic assays and nucleotide-binding studies, we show that, for CENTG1 (centaurin gamma-1) the GTPase-like domain has broader trinucleotide specificity. Alterations within the G4 motif of CENTG1 from the highly conserved NKXD found in typical GTPases to TQDR result in the loss of specificity, a lower affinity for the nucleotides and higher turnover rates. These results indicate that the centaurins could be more accurately classified as NTPases and point to alternative mechanisms of cell signalling control.

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Organizational Affiliation: 

The Structural Genomics Consortium, University of Oxford, Botnar Research Centre, Oxford OX3 7LD, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 19.85 kDa 
• Atom Count: 1,563 
• Modelled Residue Count: 176 
• Deposited Residue Count: 178 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CENTAURIN GAMMA 1	A	178	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q99490 (Homo sapiens) Explore Q99490  Go to UniProtKB:  Q99490
PHAROS:  Q99490 GTEx:  ENSG00000135439

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CAF	A	L-PEPTIDE LINKING	C5 H12 As N O3 S		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.214 
• R-Value Work: 0.150 
• R-Value Observed: 0.152 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.256	α = 90
b = 62.146	β = 90
c = 67.498	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-07-04 
Deposition Author(s): Elkins, J.M., Soundararajan, M., Yang, X., Papagrigoriou, E., Sundstrom, M., Edwards, A., Arrowsmith, C., Weigelt, J., Doyle, D.A., Structural Genomics Consortium (SGC)

Revision History  

• Version 1.0: 2006-07-04
  Type: Initial release
  
• Version 1.1: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description