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- W2056519047 abstract "GM1-gangliosidosis is a lysosomal storage disorder caused by a deficiency of ß-galactosidase activity. Human GM1-gangliosidosis has been classified into three forms according to the age of clinical onset and specific biochemical parameters. In the present study, a canine model for type II late infantile human GM1-gangliosidosis was investigated ‘in vitro’ in detail. For a better understanding of the molecular pathogenesis underlying GM1-gangliosidosis the study focused on the analysis of the molecular events and subsequent intracellular protein trafficking of β-galactosidase. In the canine model the genetic defect results in exclusion or inclusion of exon 15 in the mRNA transcripts and to translation of two mutant precursor proteins. Intracellular localization, processing and enzymatic activity of these mutant proteins were investigated. The obtained results suggested that the β-galactosidase C-terminus encoded by exons 15 and 16 is necessary for correct C-terminal proteolytic processing and enzyme activity but does not affect the correct routing to the lysosomes. Both mutant protein precursors are enzymatically inactive, but are transported to the lysosomes clearly indicating that the amino acid sequences encoded by exons 15 and 16 are necessary for correct folding and association with protective protein/cathepsin A, whereas the routing to the lysosomes is not influenced. Thus, the investigated canine model is an appropriate animal model for the human late infantile form and represents a versatile system to test gene therapeutic approaches for human and canine GM1-gangliosidosis." @default.
- W2056519047 created "2016-06-24" @default.
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- W2056519047 date "2008-09-01" @default.
- W2056519047 modified "2023-10-02" @default.
- W2056519047 title "Insights into post-translational processing of β-galactosidase in an animal model resembling late infantile human G<sub>M1</sub>-gangliosidosis" @default.
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- W2056519047 doi "https://doi.org/10.1111/j.1582-4934.2007.00204.x" @default.
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