1XKO

Structure of Thermotoga maritima CheX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and Function of an Unusual Family of Protein Phosphatases; The Bacterial Chemotaxis Proteins CheC and CheX.

Park, S.Y.Chao, X.Gonzalez-Bonet, G.Beel, B.D.Bilwes, A.M.Crane, B.R.

(2004) Mol.Cell 16: 563-574

  • DOI: 10.1016/j.molcel.2004.10.018
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In bacterial chemotaxis, phosphorylated CheY levels control the sense of flagella rotation and thereby determine swimming behavior. In E. coli, CheY dephosphorylation by CheZ extinguishes the switching signal. But, instead of CheZ, many chemotactic b ...

    In bacterial chemotaxis, phosphorylated CheY levels control the sense of flagella rotation and thereby determine swimming behavior. In E. coli, CheY dephosphorylation by CheZ extinguishes the switching signal. But, instead of CheZ, many chemotactic bacteria contain CheC, CheD, and/or CheX. The crystal structures of T. maritima CheC and CheX reveal a common fold unlike that of any other known protein. Unlike CheC, CheX dimerizes via a continuous beta sheet between subunits. T. maritima CheC, as well as CheX, dephosphorylate CheY, although CheC requires binding of CheD to achieve the activity of CheX. Structural analyses identified one conserved active site in CheX and two in CheC; mutations therein reduce CheY-phosphatase activity, but only mutants of two invariant asparagine residues are completely inactive even in the presence of CheD. Our structures indicate that the flagellar switch components FliY and FliM resemble CheC more closely than CheX, but attribute phosphatase activity only to FliY.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHEMOTAXIS protein cheX
A, B
159Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)Mutation(s): 0 
Gene Names: cheX
EC: 3.-.-.-
Find proteins for Q9X1V3 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Go to UniProtKB:  Q9X1V3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.240 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 52.210α = 90.00
b = 67.900β = 90.00
c = 78.780γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data collection
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance