Cystargamides C and D, New Cyclic Lipopeptides From a Tidal Mudflat-Derived Streptomyces sp. JMS132

Cystargamides C and D ( and ) were isolated from a marine actinomycete strain collected at Beolgyo, South Korea. The planar structures of the cystargamides were elucidated by 1/2D NMR, UV, and MS spectroscopic analyses. The absolute configurations of and were determined based on ROESY correlations a...

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Bibliographic Details
Published in:Frontiers in microbiology 2022-05, Vol.13, p.904954-904954
Main Authors: Seo, Jeongwon, Shin, Yern-Hyerk, Jo, Se Jin, Du, Young Eun, Um, Soohyun, Kim, Young Ran, Moon, Kyuho
Format: Article
Language:English
Subjects:
antioxidant activity
bacterial secondary metabolite
cystargamide
lipodepsipeptide
Microbiology
structural determination
tidal mudflat
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Summary:Cystargamides C and D ( and ) were isolated from a marine actinomycete strain collected at Beolgyo, South Korea. The planar structures of the cystargamides were elucidated by 1/2D NMR, UV, and MS spectroscopic analyses. The absolute configurations of and were determined based on ROESY correlations and the advanced Marfey's methods. The structures of the compounds were elucidated as new lipodepsipeptides bearing six amino acids with an epoxy fatty acid side chain. For the first time, the nonribosomal peptide synthetase biosynthetic pathway of the cystargamides has been proposed using whole genome sequence analysis. The cystargamides displayed antioxidant effect in the DPPH and ABTS assay. The discovery of new cyclic lipopeptides, cystargamides C and D, from a tidal mudflat-derived sp. supported that marine bacteria have potential as source of bioactive natural products.
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2022.904954