Acaterin, a novel inhibitor of acyl-CoA: Cholesterol acyltransferase produced by Pseudomonas sp. A92.

1 January 1992

journal article
Published by Japan Antibiotics Research Association in The Journal of Antibiotics

Vol. 45 (8) , 1216-1221
https://doi.org/10.7164/antibiotics.45.1216

Abstract

Acaterin, a novel inhibitor of acyl-CoA: cholesterol acyltransferase (ACAT), was isolated from a culture broth of Pseudomonas sp. A92 by Diaion HP-20 column chromatography, solvent extraction and reverse phase HPLC. Spectroscopic analyses of the compound yielded 3-(1-hydroxyoctyl)-5-methyl-2(5H)-furanone as the proposed structure. In the presence of oxidized low density lipoprotein, acaterin inhibited the synthesis of cholesteryl ester in macrophage J774 by 50% at a concentration of 45 microM. Acaterin also inhibited ACAT activity in the rat liver microsomes by 50% at a concentration of 120 microM. Kinetic studies suggested that inhibition of ACAT by acaterin was noncompetitive with respect to oleoyl-CoA.

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