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Chemotaxis of Pseudomonas sp. to caffeine and related methylxanthines
Author(s) -
Dash Swati Sucharita,
Sailaja Nori Sri,
Gummadi Sathyanaraya.
Publication year - 2008
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200700273
Subject(s) - caffeine , chemotaxis , pseudomonas , xanthine , strain (injury) , chemistry , microbiology and biotechnology , pseudomonadales , plasmid , microorganism , demethylation , biochemistry , pseudomonas putida , bacteria , biology , endocrinology , enzyme , anatomy , genetics , dna , receptor , gene expression , gene , dna methylation
Pseudomonas sp. isolated from soil of coffee plantation area has been shown to degrade higher concentrations of caffeine (∼15 g l –1 ) by N‐demethylation at a rate higher than what has been reported for any strain so far. This strain exhibits positive chemotaxis towards caffeine (1,3,7‐trimethylxanthine) in swarm plate assay and modified capillary assay in a dose dependant manner. Related methylxanthines and xanthine also act as chemoattractants for the strain with the highest relative chemotactic response (RCR) seen for xanthine. Chemotaxis in Pseudomonas sp. is possibly plasmid mediated as indicated by positive chemotaxis of plasmid transformed E. coli DH5α. The chemotactic abilities of Pseudomonas sp. combined with higher rates of degradation of caffeine can be used in the development of strategies for biodecaffeination of caffeine containing wastes. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)