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Chemical composition of anti-microbially active fractions derived from extract of filamentous fungus Keratinophyton Lemmensii including three novel bioactive compounds
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Chemical composition of anti-microbially active fractions derived from extract of filamentous fungus Keratinophyton Lemmensii including three novel bioactive compounds
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Journal Article
Chemical composition of anti-microbially active fractions derived from extract of filamentous fungus Keratinophyton Lemmensii including three novel bioactive compounds
2024
Overview
Screening for new bioactive microbial metabolites, we found a novel okaramine derivative, for which we propose the trivial name lemmokaramine, as well as two already known okaramine congeners – okaramine H and okaramine J - responsible for antimicrobial activity of the recently described microscopic filamentous fungus,
Keratinophyton lemmensii
BiMM-F76 (= CCF 6359). In addition, two novel substances, a new cyclohexyl denominated lemmensihexol and a new tetrahydroxypyrane denominated lemmensipyrane, were purified and characterized. The compounds were isolated from the culture extract of the fungus grown on modified yeast extract sucrose medium by means of flash chromatography followed by preparative HPLC. The chemical structures were elucidated by NMR and LC-MS. The new okaramine (lemmokaramine) exerted antimicrobial activity against Gram-positive and Gram-negative bacteria, yeasts and fungi and anticancer activity against different mammalian cell lines (Caco-2, HCT116, HT29, SW480, MCM G1, and MCM DLN). Furthermore, we found a significant antioxidant effect of lemmokaramine following H
2
O
2
treatment indicated by activation of the Nrf2 pathway. This is the first report describing analysis and structural elucidation of bioactive metabolites for the onygenalean genus
Keratinophyton
.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 631/326
/ 631/92
/ Anti-Infective Agents - chemistry
/ Anti-Infective Agents - pharmacology
/ Antineoplastic Agents - chemistry
/ Antineoplastic Agents - isolation & purification
/ Antineoplastic Agents - pharmacology
/ Bacteria
/ Fungi
/ Humanities and Social Sciences
/ Humans
/ Science
/ Sucrose
/ Yeast
