Representative LC/UV chromatogram under typical analytical conditions (C18 column; mobile phase: 30–70% ACN / H2O (0.05% H3PO4), linear gradient 20 min; flow rate: 0.2 mL/min; detection: 210 nm).
NMR Spectral Data
Representative 1H NMR (500 MHz) spectrum confirming the structure of Amidepsine A. Representative 13C NMR (125 MHz) spectrum supporting structural assignment of Amidepsine A.
Source Organism
Humicola sp.
Summary
Amidepsine A is a fungal diacylglycerol acyltransferase (DGAT) inhibitor that suppresses triacylglycerol formation in lipid metabolism studies.
Details
Amidepsine A is a fungal depside metabolite produced by Humicola sp. FO-2942 and identified as an inhibitor of diacylglycerol acyltransferase (DGAT), a key enzyme in triacylglycerol biosynthesis. Structural elucidation by spectroscopic analyses, including NMR, established its aromatic ester-amide architecture. Biological evaluation demonstrated inhibition of DGAT activity in rat liver microsomes with micromolar potency and suppression of triacylglycerol formation in intact Raji cells, confirming intracellular activity. These findings establish amidepsine A as a lipid metabolism modulator targeting DGAT-dependent triglyceride biosynthesis pathways.