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References Suggestions


Standard Name


Gene Synonym(s)

ECK1415, b1421, JW1417[1], JW1417

Product Desc.


Component of MCP-III[2][3]

Ribose, galactose chemoreceptor, methyl-accepting; MCP III; flagellar regulon[4]

Product Synonyms(s)

methyl-accepting chemotaxis protein III, ribose and galactose sensor receptor[1], B1421[2][1], Trg[2][1] , ECK1415, JW1417, b1421

Function from GO

<GO_nr />

Knock-Out Phenotype

transcription unit(s): trg[2]

Quick Links

porteco.png EcoCyc.gif regulondb.jpg

dnadisplay.png proteindisplay.png   pubmed.jpg   textpresso.jpg  

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Trg senses ribose and galactose indirectly through their periplasmic binding proteins. Trg is a low-abundance chemoreceptor, 5- 10-fold lower than Tar and Tsr. Trg can function as a warm receptor during thermotaxis. Trg senses low pH as an attractant and phenol as a repellent.[4]


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  1. 1.0 1.1 1.2 1.3 Riley, M. et al. (2006) Nucleic Acids Res 34:1-6 (corrected supplemental data from B. Wanner)
  2. 2.0 2.1 2.2 2.3 2.4 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  3. 3.0 3.1 EcoCyc (release 11.1; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  4. 4.0 4.1 EcoGene: Rudd, KE (2000) EcoGene: a genome sequence database for Escherichia coli K-12. Nucleic Acids Res 28:60-4.