Abstract:
:2-Chloro-4,6-diamino-s-triazine (CAAT) is a metabolite of atrazine biodegradation in soils. Atrazine chlorohydrolase (AtzA) catalyzes the dechlorination of atrazine but is unreactive with CAAT. In this study, melamine deaminase (TriA), which is 98% identical to AtzA, catalyzed deamination of CAAT to produce 2-chloro-4-amino-6-hydroxy-s-triazine (CAOT). CAOT underwent dechlorination via hydroxyatrazine ethylaminohydrolase (AtzB) to yield ammelide. This represents a newly discovered dechlorination reaction for AtzB. Ammelide was subsequently hydrolyzed by N-isopropylammelide isopropylaminohydrolase to produce cyanuric acid, a compound metabolized by a variety of soil bacteria.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Seffernick JL,Shapir N,Schoeb M,Johnson G,Sadowsky MJ,Wackett LPdoi
10.1128/aem.68.9.4672-4675.2002keywords:
subject
Has Abstractpub_date
2002-09-01 00:00:00pages
4672-5issue
9eissn
0099-2240issn
1098-5336journal_volume
68pub_type
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