Browsing by Author "Liu, Dennis Y."

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    Tolypocaibols: Antibacterial lipopeptaibols from a Tolypocladium sp. endophyte of the marine macroalga Spongomorpha arcta
    (American Chemical Society, 2023-06-14) Morehouse, Nicholas J.; Flewelling, Andrew J.; Liu, Dennis Y.; Cavanagh, Hannah; Linington, Roger G.; Johnson, John A.; Gray, Christopher A.
    Two new lipopeptaibols, tolypocaibols A (1) and B (2), and the mixed NRPS-polyketide shikimate natural product maximiscin [(P/M)-3)] were isolated from a Tolypocladium sp. fungal endophyte of the marine alga Spongomorpha arcta. Analysis of NMR and mass spectrometry data revealed the amino acid sequences of the lipopeptaibols, which both comprise 11 residues with a valinol C-terminus and a decanoyl acyl chain at the N-terminus. The configuration of the amino acids was determined by Marfey’s analysis. Tolypocaibols A (1) and B (2) showed moderate, selective inhibition against Gram-positive and acid-fast strains, while maximiscin [(P/M)-3)] showed moderate, broad-spectrum inhibition.