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  • Title: Monoacylglycerol lipase activity in cardiac myocytes.
    Author: Severson DL, Hee-Cheong M.
    Journal: Biochem Cell Biol; 1988 Sep; 66(9):1013-8. PubMed ID: 3190882.
    Abstract:
    Monoacylglycerol lipase activity in homogenates of isolated myocardial cells (myocytes) from rat hearts was recovered in both particulate and soluble subcellular fractions. The activity present in the microsomal (100,000 X g pellet) fraction was solubilized by treatment with Triton X-100 and combined with the 100,000 X g supernatant fraction; the properties of monoacylglycerol lipase were investigated with this soluble enzyme preparation. The Km for the hydrolysis of a 2-monoolein substrate was 16 microM. The rates of hydrolysis of 1-monoolein and 2-monoolein were identical, and 1-monoolein was a competitive inhibitor (Ki = 20 microM) of the hydrolysis of 2-monoolein. Monoacylglycerol lipase activity was regulated by product inhibition according to the following order of potency: fatty acyl CoA greater than free fatty acids greater than fatty acyl carnitine.
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