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- W1983193764 abstract "C-1027 is an enediyne antitumor antibiotic composed of four distinct moieties: an enediyne core, a deoxy aminosugar, a β-amino acid, and a benzoxazolinate moiety. We now show that the benzoxazolinate moiety is derived from chorismate by the sequential action of two enzymes—SgcD, a 2-amino-2-deoxyisochorismate (ADIC) synthase and SgcG, an iron–sulfur, FMN-dependent ADIC dehydrogenase—to generate 3-enolpyruvoylanthranilate (OPA), a new intermediate in chorismate metabolism. The functional elucidation and catalytic properties of each enzyme are described, including spectroscopic characterization of the products and the development of a fluorescence-based assay for kinetic analysis. SgcD joins isochorismate (IC) synthase and 4-amino-4-deoxychorismate (ADC) synthase as anthranilate synthase component I (ASI) homologues that are devoid of pyruvate lyase activity inherent in ASI; yet, in contrast to IC and ADC synthase, SgcD has retained the ability to aminate chorismate identically to that observed for ASI. The net conversion of chorismate to OPA by the tandem action of SgcD and SgcG unambiguously establishes a new branching point in chorismate metabolism." @default.
- W1983193764 created "2016-06-24" @default.
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- W1983193764 date "2008-01-15" @default.
- W1983193764 modified "2023-10-03" @default.
- W1983193764 title "Biosynthesis of the enediyne antitumor antibiotic C-1027 involves a new branching point in chorismate metabolism" @default.
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- W1983193764 doi "https://doi.org/10.1073/pnas.0708750105" @default.
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