Using the ATP-independent transacylase CapW required for the biosynthesis of capuramycin-type antibiotics, we developed a biocatalytic approach for the synthesis of 43 analogues via a one-step aminolysis reaction from a methyl ester precursor as an acyl donor and various nonnative amines as acyl acceptors. Further examination of the donor substrate scope for CapW revealed that this enzyme can also catalyze a direct transamidation reaction using the major capuramycin congener as a semisynthetic precursor. Biological activity tests revealed that a few of the new capuramycin analogues have significantly improved antibiotic activity against Mycobacterium smegmatis MC2 155 and Mycobacterium tuberculosis H37Rv. Furthermore, most of the analogues are able to be covalently modified by the phosphotransferase CapP/Cpr17 involved in self resistance, providing critical insight for future studies regarding clinical development of the capuramycin antimycobacterial antibiotics.
|Number of pages||7|
|Journal||Organic and Biomolecular Chemistry|
|State||Published - Apr 28 2016|
Bibliographical noteFunding Information:
This work was supported by National Institute of Health grants AI087849 (S. V. L.) and UL1TR000117 (S. G.-T. and S. V. L.), a National Science Foundation CAREER award MCB 114927 (S. G-T.), and National Natural Science Foundation of China grants 81261120417, 81321004, and 81273414 (Z. Y.).
© The Royal Society of Chemistry 2016.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry