Two 3′-O-β-glucosylated nucleoside fluorometabolites related to nucleocidin in Streptomyces calvus
| Autor: | David O'Hagan, Xuan Feng, Phillip T. Lowe, Joshua Clark, Davide Bello |
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| Přispěvatelé: | University of St Andrews. School of Chemistry, University of St Andrews. EaSTCHEM, University of St Andrews. Biomedical Sciences Research Complex |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
biology 010405 organic chemistry Chemistry NDAS Fluorinase General Chemistry 010402 general chemistry QD Chemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Enzyme Biosynthesis Biochemistry Gene cluster Glycosyltransferase Streptomyces calvus biology.protein QD Nucleoside Gene |
| Popis: | Authors thank the EPSRC Catalysis HUB (University of Manchester) for financial support. We also thank Roger Howard, Usa Reilly, Jeffery Janso and Alessandra Eustaquio at the Biocatalysis Technologies Laboratory, Pfizer, Groton, USA, for financial support, a producing strain of S. calvus, and supporting the research with genome sequencing. The antibiotic nucleocidin is a product of the soil bacterium Streptomyces calvus T-3018. It is among the very rare fluorine containing natural products but is distinct from the other fluorometabolites in that it is not biosynthesised from 5′-fluorodeoxyadenosine via the fluorinase. It seems to have a unique enzymatic fluorination process. We disclose here the structures of two 4′-fluoro-3′-O-β-glucosylated metabolites (F-Mets I and II) which appear and then disappear before nucleocidin production in batch cultures of S. calvus. Full genome sequencing of S. calvus T-3018 and an analysis of the putative biosynthetic gene cluster for nucleocidin identified UDP-glucose dependent glucosyl transferase (nucGT) and glucosidase (nucGS) genes within the cluster. We demonstrate that these genes express enzymes that have the capacity to attach and remove glucose from the 3′-O-position of adenosine analogues. In the case of F-Met II, deglucosylation with the NucGS glucosidase generates nucleocidin suggesting a role in its biosynthesis. Gene knockouts of nucGT abolished nucelocidin production. Publisher PDF |
| Databáze: | OpenAIRE |
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