Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: EC:3.2.1.21 (
beta-glucosidase
)
3,280
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Dictyostelium discoideum strain HMW-426 has been previously shown to be defective in the proteolytic processing of the lysosomal enzyme precursor to alpha-mannosidase. We have now shown that the mutant is defective in the proteolytic processing of a second lysosomal enzyme,
beta-glucosidase
. Digestion of the HMW-426 alpha-mannosidase and
beta-glucosidase
precursors with endoglycosidase H revealed that the majority of oligosaccharide side chains on both precursors were sensitive to cleavage by this enzyme, indicating that both precursors fail to reach the Golgi apparatus. Subcellular fractionation experiments demonstrated that these two mutant precursors accumulated inside the lumen of the rough endoplasmic reticulum. The alpha-mannosidase precursor is conformationally altered, as evidenced by its abnormal protease susceptibility, suggesting that altered conformation is responsible for a generalized defect in transport of
lysosomal protein
precursors from the rough endoplasmic reticulum in the mutant.
...
PMID:A single mutation prevents the normal intracellular transport of multiple lysosomal proteins from the rough endoplasmic reticulum. 311 35
