gangliosidoses/protease

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Protease-resistant modified human β-hexosaminidase B ameliorates symptoms in GM2 gangliosidosis model.

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GM2 gangliosidoses, including Tay-Sachs and Sandhoff diseases, are neurodegenerative lysosomal storage diseases that are caused by deficiency of β-hexosaminidase A, which comprises an αβ heterodimer. There are no effective treatments for these diseases; however, various strategies aimed at restoring

Characterization of beta-galactosidase mutations Asp332-->Asn and Arg148-->Ser, and a polymorphism, Ser532-->Gly, in a case of GM1 gangliosidosis.

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We have identified and characterized three missense mutations in a patient with type 1 G(M1) gangliosidosis, namely a substitution of G for A at nucleotide position 1044 (G1044-->A; in exon 10) on one allele, which converts Asp(332) into asparagine, and both a mutation (C492-->A in exon 4, leading

Complementation, cross correction, and drug correction studies of combined beta-galactosidase neuraminidase deficiency in human fibroblasts.

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Neuraminidase activity in fibroblasts obtained from a patient with combined beta-galactosidase-neuraminidase deficiency (beta-gal-/neur-) was partially restored by fusion with two ML I cell lines and an ML II cell line. As observed with neuraminidase activity, beta-galactosidase also showed

Purification and characterization of an activator protein for the degradation of glycolipids GM2 and GA2 by hexosaminidase A.

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The activator protein for the degradation of glycolipids GM2 and GA2 by hexosaminidase A was purified some 2 500-fold from normal human kidney. It has a molecular weight of approximately 25 000 is heat-stable up to 60 degrees C, possesses an isoelectric point of pH 4.8 and is digestible by

Intracellular processing and maturation of mutant gene products in hereditary beta-galactosidase deficiency (beta-galactosidosis).

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Heterogeneous patterns of biosynthesis, posttranslational processing, and degradation were demonstrated for mutant enzymes in three clinical forms of beta-galactosidase deficiency (beta-galactosidosis): juvenile GM1-gangliosidosis, adult GM1-gangliosidosis, and Morquio B disease. The precursor of

Early proteolytic cleavage with loss of a C-terminal fragment underlies altered processing of the beta-galactosidase precursor in galactosialidosis.

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Processing of human beta-galactosidase (beta-GAL) was studied in permanently transfected Chinese hamster ovary (CHO) cells and compared with that in normal cells and in cells from subjects with GM1-gangliosidosis, galactosialidosis and I-cell disease. Biosynthesis of beta-GAL in CHO cells results in

Inherited lysosomal storage disease associated with deficiencies of beta-galactosidase and alpha-neuraminidase in sheep.

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Histopathologic, ultrastructural and Golgi impregnation studies disclosed lesions characteristic of a neuronal lysosomal storage disease in related sheep with onset of neurologic signs at 4-6 months. Biochemical and enzymatic evaluation disclosed storage of GM1 ganglioside, asialo-GM1, and neutral

Intracellular Delivery of β-Galactosidase Enzyme Using Arginase-Responsive Dextran Sulfate/Poly-l-arginine Capsule for Lysosomal Storage Disorder.

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β-Galactosidase (β-gal) is one of the important lysosomal enzymes that is involved in the breakdown of glycosphingolipids (e.g., GM1 ganglioside), and its deficiency leads to GM1 Gangliosidosis, a lysosomal storage disorder (LSD). Intracellular delivery of β-gal is one of the preferable methods to

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