We have characterized a new mutant mouse that has virtually no /-glucuronidase activity. This biochemical defect causes a murine lysosomal storage disease that has many interesting similarities to human mucopolysaccharidosis type VII (MPS VII; Sly syndrome; fl-glucuronidase deficiency). Genetic analysis showed that the mutation is inherited as an autosomal recessive that maps to the fl-glucuron...

Far-red light and long photoperiods promote flowering in Arabidopsis. We report here that when 30-day-old vegetative plants were induced with a continuous light treatment enriched in far-red light, flowers developed directly from previously initiated primordia. Specifically, plants induced with our continuous incandescent-enriched (CI) treatment produced an average of two primary-axis nodes wit...

Cellulose-binding domains (CBDs) are protein domains with cellulose-binding activity, and some act as leaders in the localization of cellulosomal scaffoldin proteins to the hydrophobic surface of crystalline cellulose. In this study, we found that a CBD fusion enhanced and improved soluble β-glucuronidase (GusA) enzyme properties through the formation of an artificially oligomeric state. First,...

Individuals exposed to carcinogenic aromatic amines excrete arylamine N- and O-glucuronide metabolites. This study assessed the susceptibility of selected glucuronides to hydrolysis by human and Escherichia coli beta-glucuronidase. N- or O-glucuronides were prepared with the following aglycones: benzidine, N-acetylbenzidine, N'-hydroxy-N-acetylbenzidine, N-hydroxy-N-acetylbenzidine, N-hydroxy-N...

1. Biosynthetic sodium (N-acetyl-N-phenylhydroxylamine NO-f-D-glucosid)uronate is hydrolysed completely by purified mouse urinary fl-glucuronidase into the products N-acetyl-N-phenylhydroxylamine and glucuronic acid. The hydrolysis is inhibited by saccharo-(1 -*4)-lactone. These results not only confirm the identity and purity of the substrate but also establish it as a substrate for :-glucuron...

The relatively specific inhibition of &glucuronidase by cholesterol and retinol (vitamin A alcohol) has been studied. Both hydrolysis and transfer reactions are inhibited. The hydrolysis reaction is inhibited 70% by 1 X low4 M retinol and by 7.8 X lo+ M cholesterol. Inhibition increases with concentration and approaches an asymptotic maximum. fl-Glucuronidases tested from a wide variety of mamm...

Rosetting and non-rosetting lymphocytes collected from normal individuals were stained for the presence of beta-glucuronidase, periodic-acid Schiff activity, gamma glutamyl transpeptidase, acid phosphatase, and alpha-naphthyl butyrate esterase. Lymphocytes which formed rosettes with sheep erythrocytes and non-rosette forming lymphocytes contained cytochemical reaction products for all five stai...

The cis-acting elements for regulating gene expression of the tobacco pathogenesis-related 1a protein gene were analyzed in transgenic plants. The 5'-flanking 2.4-kilobase fragment from the pathogenesis-related 1a protein gene was joined to the bacterial beta-glucuronidase gene and introduced into tobacco cells by Agrobacterium-mediated gene transfer. Promoter activity was monitored by quantita...

beta-Glucuronidase is an enzyme often employed to de-conjugate beta-glucuronides during urinary drug testing for benzodiazepines. It is commonly accepted that use of beta-glucuronidase is a preferred method of hydrolysis over acid-catalyzed hydrolysis, which is known to induce benzodiazepine degradation and transformation. Literature to date, however, has not reported any cases of benzodiazepin...

beta-Glucuronidase from human lung neoplasms of various histological types and from uninvolved tissues was studied. A significant elevation of beta-glucuronidase activity was observed in adenocarcinoma and squamous cell carcinoma of the lung as compared with the corresponding uninvolved tissues (P less than 0.01). Saccharo-1,4-lactone, a strong inhibitor of the enzyme, exhibited a substantially...