Pyripyropene A is a potent and selective inhibitor of sterol O-acyltransferase 2 (SOAT2) acyl-coenzyme A:cholesterol acyltransferase 2 (ACAT2)(IC50 of 0.07 µM).
Lauroyl-coenzyme A can function as an acyl group carrier, acetyl-CoA. It can be used as an intermediate in lipid metabolism and is involved in lipid biosynthesis and fatty acid transport.
Acyl-coenzyme A: cholesterol acyltransferase-1 and -2 (ACAT-1 and ACAT-2) catalyze the formation of cholesterol esters from cholesterol and long chain fatty acyl-coenzyme A, and may play a role in the development of atherosclerosis. CAY10485 inhibits human ACAT-1 and ACAT-2 with an IC50 values of 95 and 81 μM, respectively. It also inhibits copper-mediated oxidation of low density lipoproteins by 91% at a concentration of 2 μM.
Beauveriolide I is a cyclodepsipeptide that has been found inBeauveriaand an inhibitor of lipid droplet formation.1It inhibits lipid droplet formation when used at concentrations of 3 and 10 μM, as well as inhibits cholesterol synthesis (IC50= 0.78 μM), in primary mouse peritoneal macrophages.1,2Beauveriolide I also inhibits acyl-coenzyme A:cholesterol acyltransferase (ACAT) activity in mouse macrophage membranes (IC50= 6 μM).2 1.Namatame, I., Tomoda, H., Si, S., et al.Beauveriolides, specific inhibitors of lipid droplet formation in mouse macrophages, produced by Beauveria sp. FO-6979J. Antibiot. (Tokyo)52(1)1-6(1999) 2.Namatame, I., Tomoda, H., Ishibashi, S., et al.Antiatherogenic activity of fungal beauveriolides, inhibitors of lipid droplet accumulation in macrophagesProc. Nat. Acad. Sci. USA101(3)737-742(2004)
Terpendole I is a fungal metabolite that has been found in A. yamanashiensis.1 It is a weak inhibitor of acyl-coenzyme A:cholesterol acyltransferase (ACAT; IC50 = 145 μM) and is active against the bacteria B. cereus and B. subtilis (MICs = 100 μg/ml for both) but not S. aureus, P. aeruginosa, or K. pneumoniae (MICs = >200 μg/ml for all) or the fungus C. albicans (MIC = 200 μg/ml).1,2 It is cytotoxic to HeLa cells with an IC50 value of 52.6 μM.3 |1. Tomoda, H., Tabata, N., Yang, D.-J., et al. Terpendoles, novel ACAT inhibitors produced by Albophoma yamanashiensis. III. Production, isolation and structure elucidation of new components. J. Antibiot. (Tokyo) 48(8), 793-804 (1995).|2. Zhao, J.-C., Wang, Y.-L., Zhang, T.-Y., et al. Indole diterpenoids from the endophytic fungus Drechmeria sp. as natural antimicrobial agents. Phytochemistry 148, 21-28 (2018).|3. Nagumo, Y., Motoyama, T., Hayashi, T., et al. Structure-activity relationships of terpendole E and its natural derivatives. ChemistrySelect 2(4), 1533-1536 (2017).
Acyl-Coenzyme A: cholesterol acyltransferase-1 and -2 (ACAT-1 and ACAT-2) catalyze the formation of cholesterol esters from cholesterol and long chain fatty acyl-coenzyme A, and may play a role in the development of atherosclerosis. CAY10486 inhibits human ACAT-1 and ACAT-2 equally with an IC50 value of approximately 60 μM. It also inhibits copper-mediated oxidation of low density lipoproteins by about 28% at a concentration of 3 μM.