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Studies of the Biosynthesis of DTX-5a and DTX-5b by the Dinoflagellate Prorocentrum maculosum: Regiospecificity of the Putative Baeyer−Villigerase and Insertion of a Single Amino Acid in a Polyketide Chain
journal contribution
posted on 2002-12-19, 00:00 authored by Gordon R. Macpherson, Ian W. Burton, Patricia LeBlanc, John A. Walter, Jeffrey L. C. WrightThe biosynthetic origins of the diarrhetic shellfish poisoning toxins DTX-5a and DTX-5b have been
elucidated by supplementing cultures of the producing organism Prorocentrum maculosum with
stable isotope labeled precursors and determining the incorporation patterns by 13C NMR
spectroscopy. The amino acid residue in the sulfated side chain is found to originate from glycine,
and oxygen insertion in the chain is shown to occur after polyketide formation.