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Organic & Biomolecular Chemistry

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Paper

Org. Biomol. Chem., 2008, 6, 3315 - 3327, DOI: 10.1039/b807914e

Engineered biosynthesis of hybrid macrolide polyketides containing D-angolosamine and D-mycaminose moieties

Ursula Schell, Stephen F. Haydock, Andrew L. Kaja, Isabelle Carletti, Rachel E. Lill, Eliot Read, Lesley S. Sheehan, Lindsey Low, Maria-Jose Fernandez, Friederike Grolle, Hamish A. I. McArthur, Rose M. Sheridan, Peter F. Leadlay, Barrie Wilkinson and Sabine Gaisser

The glycosylation of natural product scaffolds with highly modified deoxysugars is often essential for their biological activity, being responsible for specific contacts to molecular targets and significantly affecting their pharmacokinetic properties. In order to provide tools for the targeted alteration of natural product glycosylation patterns, significant strides have been made to understand the biosynthesis of activated deoxysugars and their transfer. We report here efforts towards the production of plasmid-borne biosynthetic gene cassettes capable of producing TDP-activated forms of D-mycaminose, D-angolosamine and D-desosamine. We additionally describe the transfer of these deoxysugars to macrolide aglycones using the glycosyl transferases EryCIII, TylMII and AngMII, which display usefully broad substrate tolerance.

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