Metabolism-independent chemotaxis of Pseudomonas sp. strain WBC-3toward aromatic compounds
ZHANG Junjie , XIN Yufeng , LIU Hong , WANG Shujun , ZHOU Ningyi
DOI:
Received November 28, 2007,Revised January 23, 2008, Accepted , Available online
Volume 20,2008,Pages 1238-1242
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Pseudomonas sp. strain WBC-3 utilized methyl parathion or para-nitrophenol (PNP) as the sole source of carbon, nitrogen, and
energy, and methyl parathion hydrolase had been previously characterized. Its chemotactic behaviors to aromatics were investigated.
The results indicated that strain WBC-3 was attracted to multiple aromatic compounds, including metabolizable or transformable
substrates PNP, 4-nitrocatechol, and hydroquinone. Disruption of PNP catabolic genes had no e ect on its chemotactic behaviors with
the same substrates, indicating that the chemotactic response in this strain was metabolism-independent. Furthermore, it was shown
that strain WBC-3 had a constitutive -ketoadipate chemotaxis system that responded to a broad range of aromatic compounds, which
was di erent from the inducible -ketoadipate chemotaxis described in other Pseudomonas strains.
