Abstract
Chemical investigation of a halophilic actinomycete strain belonging to the genus Nocardiopsis inhabiting a hypersaline saltern led to the discovery of new 18-membered macrolides with nitrile functionality, borrelidins C-E (1-3), along with a previously reported borrelidin (4). The planar structures of borrelidins C-E, which are new members of the rare borrelidin class of antibiotics, were elucidated by NMR, mass, IR, and UV spectroscopic analyses. The configurations of borrelidines C-E were determined by the interpretation of ROESYNMRspectra, J-based configuration analysis, a modified Mosher's method, and CD spectroscopic analysis. Borrelidins C and D displayed inhibitory activity, particularly against the Gram-negative pathogen Salmonella enterica, and moderate cytotoxicity against the SNU638 and K562 carcinoma cell lines.
Original language | English |
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Article number | 166 |
Journal | Marine Drugs |
Volume | 15 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2017 |
Bibliographical note
Publisher Copyright:© 2017 by the authors.
Keywords
- Antibacterial
- Borrelidin
- Halophilic actinomycetes
- Salmonella enterica
- Saltern