title: Purification and chemical properities of mouse liver lysosomal (L form) beta-glucuronidase.
abstract: The lysosomal form (L form) of beta-glucuronidase was purified 6,500-fold from the liver of C57BL/6J mice with high yield. Purified enzyme was homogeneous as judged by polyacrylamide gel electrophoresis in the presence or absence of sodium dodetcyl sulfate. The microsomal forms of beta-glucuronidase were spontaneously converted to the L form. The purified L form is a tetramer of molecular weight of 280,000 to 300,000, composedd of four identical subunits of 75,000 molecular weight. The enzyme contains a high content of arginine and glutamic acid and a very low content of sulfur-containing amino acids. Approximately 7% of the enzyme molecule is compose of carbohydrate. Sugars in the L form are glucosamine, mannose, galactose, and glucose. Sialic acid and fucose are absent in the enzyme.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002241:Carbohydrates / Q000032:analysis; D004355:Drug Stability; D004591:Electrophoresis, Polyacrylamide Gel; D005796:Genes; D005966:Glucuronidase / Q000032:analysis / Q000302:isolation & purification*; D006358:Hot Temperature; D008099:Liver / Q000201:enzymology*; D008247:Lysosomes / Q000201:enzymology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008970:Molecular Weight; D009154:Mutation
chemical_list: D000596:Amino Acids; D002241:Carbohydrates; D005966:Glucuronidase