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[Alpha-mannosidase activity of different human biological fluids]
Comptes Rendus Hebdomadaires Des Seances De L'Academie Des Sciences. Serie D: Sciences Naturelles
|May 26, 1975
Summary
Researchers identified two alpha-mannosidases in biological fluids: enzyme S in serum and enzyme U in urine. Enzyme S activity is higher in children
Area of Science:
- Biochemistry
- Enzymology
Context:
- Biological fluids contain enzymes with varying properties.
- Alpha-mannosidases play roles in cellular processes.
Purpose:
- To differentiate and characterize distinct alpha-mannosidase enzymes.
- To investigate enzyme activity across different biological samples and pH levels.
Summary:
- Two alpha-mannosidases, designated S and U, were identified based on pH optima and cofactor effects.
- Enzyme S (optimum pH ~5.6) predominates in serum, while enzyme U (optimum pH ~4.2) is found in urine.
- Cerebrospinal fluid contains similar levels of both enzymes, and serum alpha-mannosidase S activity is higher in children than adults.
Impact:
- Establishes a biochemical basis for distinguishing alpha-mannosidase isoforms.
- Provides foundational data for understanding enzyme distribution and age-related variations.
- Highlights potential diagnostic or research applications for alpha-mannosidase S and U characterization.