Abstract
The overproduction, purification, and in vitro characterization of the polyene glycosyltransferases (GTs) AmphDI and NysDI are reported. A novel nucleotidyltransferase mutant (RmlA Q83D) for the chemoenzymatic synthesis of unnatural GDP-sugar donors in conjunction with polyene GT-catalyzed sugar exchange/reverse reactions allowed the donor and acceptor specificities of these novel enzymes to be probed. The evaluation of polyene GT aglycon and GDP-sugar donor specificity revealed some tolerance to aglycon structural diversity, but stringent sugar specificity, and culminated in new polyene analogues in which L-gulose or D-mannose replace the native sugar D-mycosamine.
Original language | English |
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Pages (from-to) | 2506-2514 |
Number of pages | 9 |
Journal | ChemBioChem |
Volume | 9 |
Issue number | 15 |
DOIs | |
State | Published - Oct 13 2008 |
Keywords
- Antifungal
- Carbohydrates
- Drugs
- Glycosylation
- Sugars
ASJC Scopus subject areas
- Biochemistry
- Molecular Medicine
- Molecular Biology
- Organic Chemistry