Sclerotiorin, a novel inhibitor of lipoxygenase from Penicillium frequentans.

Chidananda, C. and Sattur, A. P. (2007) Sclerotiorin, a novel inhibitor of lipoxygenase from Penicillium frequentans. Journal of agricultural and food chemistry, 55 (8). pp. 2879-83. ISSN 0021-8561

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Abstract

Foods rich with unsaturated fatty acids are prone to enzymatic and nonenzymatic lipid peroxidation; lipoxygenase, a metalloenzyme and a free radical former, oxidizes polyunsaturated fatty acids and is one of the key enzymes in lipid oxidation. Here, we report sclerotiorin, purified from the fermented broth of Penicillium frequentans, as a potent reversible, uncompetitive inhibitor against soybean lipoxygenase-1 (LOX-1) with a half-maximal value (IC50) of 4.2 microM. The inhibitor also showed an antioxidant property by scavenging free radical with an ED50 of 0.12 microM; in addition, nonenzymatic lipid peroxidation was inhibited with a PD50 value of 64 microM and did not show metal chelation. The observations made in this study suggest that sclerotiorin possibly inhibits LOX in two ways: one, by interacting with the enzyme-substrate complex, and two, as an antioxidant by quenching or trapping the free radical intermediates formed in the enzyme reaction. Sclerotiorin compares well with other known natural and synthetic lipoxygenase inhibitors.

Item Type:	Article
Uncontrolled Keywords:	Antioxidant; inhibitor; lipoxygenase; Penicillium frequentans; sclerotiorin
Subjects:	500 Natural Sciences and Mathematics > 07 Life Sciences > 04 Microbiology > 04 Fungi 600 Technology > 08 Food technology > 32 Antioxidants
Divisions:	Fermentation Technology and Bioengineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	07 Aug 2008 11:07
Last Modified:	03 Jul 2015 08:03
URI:	http://ir.cftri.res.in/id/eprint/1879

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