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Journal Article
Research Support, Non-U.S. Gov't
Biosynthetic Origin of the Hydroxamic Acid Moiety of Trichostatin A: Identification of Unprecedented Enzymatic Machinery Involved in Hydroxylamine Transfer.
Journal of the American Chemical Society 2017 May 25
Trichostatin A (TSA) is widely used in the field of epigenetics because it potently inhibits histone deacetylase (HDAC). In-depth studies have revealed that the hydroxamic acid group in TSA chelates the zinc(II) ion in the active site of HDAC to realize the inhibitory activity. Here we report the first identification of a complete TSA biosynthetic gene cluster from Streptomyces sp. RM72 and the heterologous production of TSA in Streptomyces albus. Biochemical analyses unambiguously demonstrate that unprecedented biosynthetic machinery catalyzes the direct transfer of hydroxylamine from a nonproteinogenic amino acid, l-glutamic acid γ-monohydroxamate, to the carboxylic acid group of trichostatic acid to form the hydroxamic acid moiety of TSA. The present study establishes the biosynthetic pathway of TSA, paving the way toward understanding the biosynthesis of other hydroxamic acid-containing natural products.
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