Stereochemistry of C-3 deoxygenation of sugar nucleosides: formation of pentopyranine C from [3-2H]-D-glucose by Streptomyces griseochromogenes
作者:Steven J. Gould、Jincan Guo
DOI:10.1021/ja00052a014
日期:1992.12
Cytosylglucuronicacid (CGA) has previously been shown to be the first intermediate in the biosynthesis of the antibiotic blasticidinS (BS), produced by Streptomycesgriseochromogenes. Addition of aminooxyacetic acid (AOAA), an inhibitor of pyridoxal phosphate/pyridoxamine phsophate-dependent transminases, to S. griseochromogenes fermentations led to substantial accumulations of CGA and pentopyranine
Reevaluation of the Final Steps in the Biosynthesis of Blasticidin S by Streptomyces griseochromogenes and Identification of a Novel Self-Resistance Mechanism
作者:Qibo Zhang、Martha C Cone、Steven J Gould、T Mark Zabriskie
DOI:10.1016/s0040-4020(99)01060-1
日期:2000.1
steps in the biosynthesis of the antifungal peptidyl-nucleoside blasticidinS (3) have been revised to include a novel self-resistance mechanism wherein the previously proposed final precursor, demethylblasticidin S (7), is modified with a leucine residue yielding leucyldemethylblasticidin S (10) which exhibits reduced antibiotic activity. Methylation of 10 yields leucylblasticidin S (9) which can