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  • Title: Study of biochemical pathway and enzyme involved in metsulfuron-methyl degradation by Ancylobacter sp. XJ-412-1 isolated from soil.
    Author: Lu P, Jin L, Liang B, Zhang J, Li S, Feng Z, Huang X.
    Journal: Curr Microbiol; 2011 Jun; 62(6):1718-25. PubMed ID: 21431836.
    Abstract:
    Ancylobacter sp. XJ-412-1, capable of degrading metsulfuron-methyl, was isolated from sulfonylurea-contaminated soil. When metsulfuron-methyl was provided as the sole carbon source, more than 90.5% of metsulfuron-methyl at concentration of 50 mg l(-1) was degraded by strain XJ-412-1 after incubation at 30°C for 7 days. The initial degradation products of metsulfuron-methyl (MSM), thifensulfuron-methyl (TSM), and bensulfuron-methyl (BSM) by XJ-412-1 were identified as corresponding deesterified derivatives by liquid chromatography-mass spectrometry, which indicated a primary pathway of the deesterification of these three sulfonylurea herbicides. The carboxyesterase activity of the cell-free extracts was assayed and strongly inhibited by 4-chloromercuribenzoic acid (PCMB), diethyl pyrocarbonate (DEPC), phenylmethylsulfonyl fluoride (PMSF), and malathion.
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