Complete characterization of the seventeen step moenomycin biosynthetic pathway.
Complete characterization of the seventeen step moenomycin biosynthetic pathway.
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DOI:
10.1021/bi901018q
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发表时间:
2009-09-22
期刊:
影响因子:
2.9
通讯作者:
Walker S
中科院分区:
文献类型:
--
作者:
Ostash B;Doud EH;Lin C;Ostash I;Perlstein DL;Fuse S;Wolpert M;Kahne D;Walker S
The moenomycins are phosphoglycolipid antibiotics produced by Streptomyces ghanaensis and related organisms. The phosphoglycolipids are the only known active site inhibitors of the peptidoglycan glycosyltransferases, an important family of enzymes involved in the biosynthesis of the bacterial cell wall. Although these natural products have exceptionally potent antibiotic activity, pharmacokinetic limitations have precluded their clinical use. We previously identified the moenomycin biosynthetic gene cluster in order to facilitate biosynthetic approaches to new derivatives. Here we report a comprehensive set of genetic and enzymatic experiments that establish functions for the seventeen moenomycin biosynthetic genes involved in the synthesis moenomycin and variants. These studies reveal the order of assembly of the full molecular scaffold and define a subset of seven genes involved in the synthesis of bioactive analogs. This work will enable both in vitro and fermentation-based reconstitution of phosphoglycolipid scaffolds so that chemoenzymatic approaches to novel analogs can be explored.
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