Journal
CHEMISTRY & BIOLOGY
Volume 10, Issue 6, Pages 541-549Publisher
CELL PRESS
DOI: 10.1016/S1074-5521(03)00120-0
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The glycopeptide A40926 is the precursor of dalbavancin, a second-generation glycopeptide currently under clinical development. The dbv gene cluster, devoted to A40926 biosynthesis, was isolated and characterized from the actinomycete Nonomuraea species ATCC39727. From sequence analysis, 37 open reading frames (ORFs) participate in A40926 biosynthesis, regulation, resistance, and export. Of these, 27 ORFs find a match in at least one of the previously characterized glycopeptide gene clusters, while 10 ORFs are, so far, unique to the dbv cluster. Putative genes could be identified responsible for some of the tailoring steps (attachment of glucosamine, sugar oxidation, and mannosylation) expected during A40926 biosynthesis. After constructing a Nonornuraea mutant by deleting dbv ORFs 8 to 10, the novel compound dechloromannosyl-A40926 aglycone was isolated.
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