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J. Bacteriol., 02 1996, 1224-1226, Vol 178, No. 4
Copyright © 1996, American Society for Microbiology

Pyrroloquinoline quinone, a chemotactic attractant for Escherichia coli

R de Jonge, MJ Teixeira de Mattos, JB Stock and OM Neijssel
Department of Microbiology, E.C. Slater Institute, University of Amsterdam, The Netherlands.

Escherichia coli is attracted by pyrroloquinoline quinone (PQQ), and chemotaxis toward glucose is enhanced by the presence of PQQ. A ptsI mutant showed no chemotactic response to either glucose or PQQ alone but did show a chemotactic response to a mixture of glucose and PQQ. A strain lacking the methylated chemotaxis receptor protein Tar showed no response to PQQ.


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