NDLI: Biodegradation of atrazine and related s-triazine compounds: from enzymes to field studies

Content Provider	Springer Nature Link
Author	Wackett, L. Sadowsky, M. Martinez, B. Shapir, N.
Copyright Year	2001
Abstract	s-Triazine ring compounds are common industrial chemicals: pesticides, resin intermediates, dyes, and explosives. The fate of these compounds in the environment is directly correlated with the ability of microbes to metabolize them. Microbes metabolize melamine and the triazine herbicides such as atrazine via enzyme-catalyzed hydrolysis reactions. Hydrolytic removal of substituents on the s-triazine ring is catalyzed by enzymes from the amidohydrolase superfamily and yields cyanuric acid as an intermediate. Cyanuric acid is hydrolytically processed to yield 3 mol each of ammonia and carbon dioxide. In those cases studied, the genes underlying the hydrolytic reactions are localized to large catabolic plasmids. One such plasmid, pADP-1 from Pseudomonas sp. ADP, has been completely sequenced and contains the genes for atrazine catabolism. Insertion sequence elements play a role in constructing different atrazine catabolic plasmids in different bacteria. Atrazine chlorohydrolase has been purified to homogeneity from two sources. Recombinant Escherichia coli strains expressing atrazine chlorohydrolase have been constructed and chemically cross-linked to generate catalytic particles used for atrazine remediation in soil. The method was used for cleaning up a spill of 1,000 pounds of atrazine to attain a level of herbicide acceptable to regulatory agencies.
Starting Page	39
Ending Page	45
Page Count	7
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	58
Issue Number	1
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-11-13
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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Evolution of atrazine-degrading capabilities in the environment

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