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Inactivation and identification of three genes encoding glycosyltransferase required for biosynthesis of nogalamycin

Shao, L.; Shi, X.; Liu, W.; Gao, X.; Pu, T.; Ma, B.; Wang, S.

Biotechnology and Applied Biochemistry 62(6): 765-771

2015

ISSN/ISBN: 1470-8744
PMID: 25524457
DOI: 10.1002/bab.1332
Accession: 058089650
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Nogalamycin is an anthracycline antitumor antibiotic, consisting of the aromatic aglycone attached with a nogalose and a nogalamine. At present, the biosynthesis pathway of nogalamycin, especially the glycosylation mechanism of the two deoxysugar moieties, had still not been extensively investigated in vivo. In this study, we inactivated the three glycotransferase genes in the nogalamycin-produced strain, and investigated the function of these genes by analyzing the metabolites profiles in the fermentation broth. The in-frame deletion of snogD and disruption of snogE abolished the production of nogalamycin completely, indicating that the gene products of snogD and snogE are essential to the biosynthesis of nogalamycin. On the other hand, in-frame deletion of snogZ does not abolish the production of nogalamycin, but production yield was reduced to 28% of the wild type, implying that snogZ gene may involved in the activation of other glycotransferases in nogalamycin biosynthesis. This study laid the foundation of modification of nogalamycin biosynthesis/production by genetic engineering methods.

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