title: The beta-glucosidases of porcine kidney.
abstract: Some of the properties of a partially purified particle bound and soluble beta-glucosidase (EC 3.2.1.21) from pig kidney were compared. The soluble beta-glucosidase (1) hydrolyzed 4-methylumbelliferyl-beta-D-glucoside (4-MU-beta-D-glucoside) 17 alpha-estradiol 3beta-glucoside. 17 alpha-estradiol 17beta-glucoside, and salicin, but not glucosylceramide, (2) possessed a broad pH optimum (5.5-7.0), (3) had an isoelectric point of 4.9, and (4) was inhibited by Triton X-100. Several compounds were found to be competitive inhibitors of its hydrolytic activity, gluconolactam and estrone beta-glucoside being the most effective. In contrast, a particulate beta-glucodidase purified from the same tissue (1) had an acidic pH optimum (5.0), (2) was stimulated by sodium taurocholate and 'Gaucher's factor' for the hydrolysis of both 4-MU-beta-glucosidase and glucosylceramide, and (3) was capable of catalyzing a transglucosylation reaction employing 4-MU-beta-D-glucoside or glucosylceramide as the glucosyl donor, and [14C]ceramide as acceptor.
mesh_terms: D000818:Animals; D004958:Estradiol / Q000378:metabolism; D004966:Estrogens, Conjugated (USP) / Q000378:metabolism; D005959:Glucosidases / Q000302:isolation & purification / Q000378:metabolism*; D005960:Glucosides / Q000378:metabolism; D006026:Glycoside Hydrolases / Q000378:metabolism; D006028:Glycosphingolipids / Q000378:metabolism; D006923:Hymecromone / Q000378:metabolism; D007668:Kidney / Q000201:enzymology*; D007700:Kinetics; D013552:Swine; D013696:Temperature
chemical_list: D004966:Estrogens, Conjugated (USP); D005960:Glucosides; D006028:Glycosphingolipids; D006923:Hymecromone; D004958:Estradiol; D005959:Glucosidases; D006026:Glycoside Hydrolases