Cytosine chemoreceptor McpC in Pseudomonas putida F1 also detects nicotinic acid

Microbiology. 2014 Dec;160(Pt 12):2661-2669. doi: 10.1099/mic.0.081968-0. Epub 2014 Oct 7.


Soil bacteria are generally capable of growth on a wide range of organic chemicals, and pseudomonads are particularly adept at utilizing aromatic compounds. Pseudomonads are motile bacteria that are capable of sensing a wide range of chemicals, using both energy taxis and chemotaxis. Whilst the identification of specific chemicals detected by the ≥26 chemoreceptors encoded in Pseudomonas genomes is ongoing, the functions of only a limited number of Pseudomonas chemoreceptors have been revealed to date. We report here that McpC, a methyl-accepting chemotaxis protein in Pseudomonas putida F1 that was previously shown to function as a receptor for cytosine, was also responsible for the chemotactic response to the carboxylated pyridine nicotinic acid.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Bacterial Proteins / metabolism*
  • Chemotaxis*
  • Cytosine / metabolism*
  • Membrane Proteins / metabolism*
  • Methyl-Accepting Chemotaxis Proteins
  • Niacin / metabolism*
  • Pseudomonas putida / physiology*


  • Bacterial Proteins
  • Membrane Proteins
  • Methyl-Accepting Chemotaxis Proteins
  • Niacin
  • Cytosine