Peptaibols from two unidentified fungi of the order Hypocreales with cytotoxic, antibiotic, and anthelmintic activities
As part of an ongoing investigation of filamentous fungi for anticancer leads, an active culture was identified from the Mycosynthetix library (MSX 70741, of the order Hypocreales, Ascomycota). The fungal extract exhibited cytotoxic activity against the H460 (human nonsmall cell lung carcinoma) cell...
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Published in | Journal of peptide science Vol. 18; no. 8; pp. 500 - 510 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Chichester, UK
John Wiley & Sons, Ltd
01.08.2012
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Subjects | |
Online Access | Get full text |
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Summary: | As part of an ongoing investigation of filamentous fungi for anticancer leads, an active culture was identified from the Mycosynthetix library (MSX 70741, of the order Hypocreales, Ascomycota). The fungal extract exhibited cytotoxic activity against the H460 (human nonsmall cell lung carcinoma) cell line, and bioactivity‐directed fractionation yielded peptaibols 1–12 and harzianums A (13) and B (14). Structure elucidation of 1–12 was facilitated by high‐resolution MS/MS using higher‐energy collisional dissociation and by high field NMR (950 MHz). The absolute configuration was determined by Marfey's analysis of the individual amino acids; the time required for such analysis was decreased via the development of a 10‐min ultra performance liquid chromatography method. The isolated peptaibols (1–12), along with three other peptaibols isolated and elucidated from a different fungus (MSX 57715) of the same order (15–17), were examined for activity in a suite of biological assays, including those for cytotoxic, antibacterial, and anthelmintic activities. Copyright © 2012 European Peptide Society and John Wiley & Sons, Ltd.
Fifteen peptaibols were isolated and characterized from two different fungal cultures; eight are new to the literature. The compounds were sequenced by MS/MS using higher‐energy collisional dissociation and high field NMR (950 MHz), both of which facilitated structure elucidation, and the absolute configuration of the amino acid residues was determined using Marfey's analysis via the development of a 10‐min ultra performance liquid chromatography method. The compounds were examined against a suite of biological assays, including cytotoxicity, antibacterial activity, and anthelmintic activity. |
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Bibliography: | ArticleID:PSC2425 istex:5B5DF59748473CF6D8AB400A18A085A1CD640978 ark:/67375/WNG-THJCXPGS-1 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1075-2617 1099-1387 |
DOI: | 10.1002/psc.2425 |