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Degradation of glutathione S-conjugates by a carboxypeptidase in the plant vacuole.
FEBS Lett. 384, 31-34 (1996)
For plants, glutathione conjugation is a major pathway to detoxify organic xenobiotic. Glutathione S-conjugates (SG-conjugates) are formed in the cytosol, the in vitro transport over the tonoplast has been described and a final storage in the vacuole has been postulated. We show here that alachlor rapidly accumulates as GS-conjugates in the plant vacuole and that the first step of its degradation, the formation of the respective gamma-glutamylcysteinyl-S-conjugate, is catalyzed by a vacuolar carboxypeptidase, These results suggest the glutathione conjugate as a transport form but not a storage form of xenobiotic molecules.
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Publication type Article: Journal article
Document type Scientific Article
Keywords detoxification; glutathione conjugate; xenobiotic; carboxypeptidase; vacuole; METABOLISM
ISSN (print) / ISBN 0014-5793
Journal FEBS Letters
Quellenangaben Volume: 384, Issue: 1, Pages: 31-34
Reviewing status Peer reviewed
Institute(s) Institute of Biochemical Plant Pathology (BIOP)