Journal
MICROBIOLOGY-SGM
Volume 148, Issue -, Pages 2883-2888Publisher
SOC GENERAL MICROBIOLOGY
DOI: 10.1099/00221287-148-9-2883
Keywords
resistance mechanism; degradation; chlorophenoxy herbicides; 2D-PAGE
Categories
Ask authors/readers for more resources
Proteome analysis of bacteria that can detoxify harmful organic compounds enables the discovery of enzymes involved in the biodegradation of these substances and proteins that protect the cell against poisoning. Exposure of Delftia acidovorans MC1 to 2,4-dichlorophenoxypropionic acid and its metabolites 2,4-dichlorophenol and 3,5-dichlorocatechol during growth on pyruvate as a source of carbon and energy induced several proteins. Contrary to the general hypothesis that lipophilic or reactive compounds induce heat shock or oxidative stress proteins, no induction of the GroEL, DnaK and AhpC proteins that were used as markers for the induction of heat shock and oxidative stress responses was observed. However, two chlorocatechol 1,2-dioxygenases, identified by amino terminal sequence analysis, were induced. Both enzymes catalyse the conversion of 3,5-dichlorocatechol to 2,4-dichloro-cis,cis-muconate indicating that biodegradation is a major mechanism of resistance in the detoxifying bacterium D. acidovorans MC1.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available