Specific Inhibition of Esterase in Ester-Hydrolysing Enzyme Systems
نویسندگان
چکیده
منابع مشابه
Inhibition of dietary cholesterol ester absorption by 3-BCP, a suicide inhibitor of cholesterol-esterase.
Cholesterol esters, which can comprise over 75% of total cholesterol in diets rich in organ meats, must first be hydrolyzed by pancreatic cholesterol esterase (EC 3.1.1.13) before being absorbed (1). In its hydrolytic mode, catalysis by the enzyme involves a classical serine esterase mechanism in which the seroxide anion displaces the sterol moiety to give an acyl-enzyme intermediate, followed ...
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The location of cholesterol esterase in rabbit intestine was re-evaluated. In three different experiments that were designed to eliminate contaminating mucus and pancreatic enzymes from the lumen of the small intestine, it was observed that the activities of cholesterol esterase and amylase in intestinal cytosol and whole homogenate decreased in parallel fashion. After the mucus was carefully w...
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Force field and first principles molecular dynamics simulations on complexes of pig liver esterase (pig liver isoenzymes and a mutant) and selected substrates (1-phenyl-1-ethyl acetate, 1phenyl-2-butylacetate, proline-β-naphthylamide and methyl butyrate) are presented. By restrained force field simulations the access of the substrate to the hidden active site was probed. For a few substrates sp...
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Cholesteryl esterase activity has been demonstrated in the corpus luteum of the rat and the cow. The hydrolytic activity in bovine corpora lutea shows two pH optima, and is distributed throughout the particulate and supernatant fractions of the tissue. The greatest activity is present in the 5000 g pellet. The size of the available endogenous cholesteryl ester pools is also estimated. Some prop...
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Purified human milk lipoamidase was digested with endoproteinase Lys-C and the digested peptides were subjected to gasphase microsequence analysis. The sequencing of three isolated peptides of human milk lipoamidase revealed the identity of this protein with human milk bile salt-stimulated lipase (pancreatic cholesterol esterase). The identity of the cholesterol esterase with lipoamidase was co...
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ژورنال
عنوان ژورنال: Nature
سال: 1946
ISSN: 0028-0836,1476-4687
DOI: 10.1038/158375a0