Crystal structure of the response regulator domain of Thermotoga maritima CheB

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.229 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural insight into the low affinity between Thermotoga maritima CheA and CheB compared to their Escherichia coli/Salmonella typhimurium counterparts

Park, S.Y.Crane, B.R.

(2011) Int J Biol Macromol 49: 794-800

  • DOI: https://doi.org/10.1016/j.ijbiomac.2011.07.012
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    CheA-mediated CheB phosphorylation and the subsequent CheB-mediated demethylation of the chemoreceptors are important steps required for the bacterial chemotactic adaptation response. Although Escherichia coli CheB has been reported to interact with CheA competitively against CheY, we have observed that Thermotoga maritima CheB has no detectable CheA-binding. By determining the CheY-like domain crystal structure of T. maritima CheB, and comparing against the T. maritima CheY and Salmonella typhimurium CheB structures, we propose that the two consecutive glutamates in the β4/α4 loop of T. maritima CheB that is absent in T. maritima CheY and in E. coli/S. typhimurium CheB may be one factor contributing to the low CheA affinity.

  • Organizational Affiliation

    School of Systems Biomedical Science, College of Natural Sciences, Soongsil University, Seoul, Republic of Korea. psy@ssu.ac.kr

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chemotaxis response regulator protein-glutamate methylesterase
A, B
164Thermotoga maritimaMutation(s): 0 
Gene Names: cheB
Find proteins for Q9WYN9 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q9WYN9 
Go to UniProtKB:  Q9WYN9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9WYN9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.715α = 90
b = 53.679β = 90
c = 131.565γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-14
    Type: Initial release
  • Version 1.1: 2013-06-19
    Changes: Database references
  • Version 1.2: 2024-03-20
    Changes: Data collection, Database references, Derived calculations