CheY

• Description: two-component response regulator, modulation of flagellar switch bias
  
  

Gene name	cheY
Synonyms	cheB
Essential	no
Product	two-component response regulator
Function	modulation of flagellar switch bias
Gene expression levels in SubtiExpress: cheY
Interactions involving this protein in SubtInteract: CheY
MW, pI	13 kDa, 4.746
Gene length, protein length	360 bp, 120 aa
Immediate neighbours	fliY, fliZ
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

transcription factors and their control, motility and chemotaxis, phosphoproteins

This gene is a member of the following regulons

CodY regulon, DegU regulon, SigD regulon, Spo0A regulon

The gene

Basic information

• Locus tag: BSU16330

Database entries

• BsubCyc: BSU16330

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family:

• Paralogous protein(s): YneI

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:
  • phosphorylated by CheA on an Asp residue
  • dephosphorylated by CheC PubMed

• Cofactors:

• Effectors of protein activity:

• Interactions:
  • CheY-P-CheC PubMed
  • CheA-CheY

• Localization:
  • cytoplasm (according to Swiss-Prot)

Database entries

• BsubCyc: BSU16330

• Structure: 1TMY (CheY from Thermotoga maritima)

• UniProt: P24072

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon:
  • flgB-flgC-fliE-fliF-fliG-fliH-fliI-fliJ-ylxF-fliK-flgD-flgE-fliL-fliM-fliY-cheY-fliZ-fliP-fliQ-fliR-flhB-flhA-flhF-flhG-cheB-cheA-cheW-cheC-cheD-sigD-swrB PubMed
  • ylxF-fliK-flgD-flgE-fliL-fliM-fliY-cheY-fliZ-fliP-fliQ-fliR-flhB-flhA-flhF-flhG-cheB-cheA-cheW-cheC-cheD-sigD-swrB PubMed

• Expression browser: cheY PubMed

• Sigma factor:
  • flgB: SigA PubMed, SigD PubMed
  • ylxF: SigD PubMed

• Regulation:
  • repressed under conditions that trigger sporulation (Spo0A) PubMed

• Regulatory mechanism:
  • Spo0A: transcription repression PubMed
  • CodY: transcription repression PubMed
  • DegU (non-phosphorylated): transcription activation PubMed
  • DegU-P: transcription repression PubMed
  • DegU-P in complex with SwrA: transcription activation PubMed

• Additional information:
  • in minimal medium, CheY is present with 7,100 +/- 1,000 molecules per cell PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 1164 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 2117 PubMed

Biological materials

• Mutant:
  • 1A798 ( cheY::cat), PubMed, available at BGSC

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Reviews

Gerald L Hazelbauer, Wing-Cheung Lai
Bacterial chemoreceptors: providing enhanced features to two-component signaling.
Curr Opin Microbiol: 2010, 13(2);124-32
[PubMed:20122866] [WorldCat.org] [DOI] (I p)

Christopher V Rao, George W Ordal
The molecular basis of excitation and adaptation during chemotactic sensory transduction in bacteria.
Contrib Microbiol: 2009, 16;33-64
[PubMed:19494578] [WorldCat.org] [DOI] (P p)

Christopher V Rao, John R Kirby, Adam P Arkin
Phosphatase localization in bacterial chemotaxis: divergent mechanisms, convergent principles.
Phys Biol: 2005, 2(3);148-58
[PubMed:16224120] [WorldCat.org] [DOI] (I e)

C Fabret, V A Feher, J A Hoch
Two-component signal transduction in Bacillus subtilis: how one organism sees its world.
J Bacteriol: 1999, 181(7);1975-83
[PubMed:10094672] [WorldCat.org] [DOI] (P p)