Exploration of the Molecular Origin of the Azinomycin Epoxide: Timing of the Biosynthesis Revealed
作者:Vasudha Sharma、Gilbert T. Kelly、Coran M. H. Watanabe
DOI:10.1021/ol8018852
日期:2008.11.6
Streptomyces sahachiroi whole cell feeding experiments, utilizing putative precursors labeled with stable isotopes, established that the epoxide unit of the DNA cross-linked agents, azinomycin A and B, proceeds via a valine-dependent pathway and that hydroxylation and dehydration precedes formation of the terminal epoxide. Sodium 3-methyl-2-oxobutenoate, formed through a transimination reaction, was shown to be the penultimate precursor incorporated into the azinomycin epoxide.