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THE DIGESTION AND INACTIVATION OF MALTASE BY TRYPSIN AND THE SPECIFICITY OF MALTASES
1Department of Physiology and Physiological Chemistry of the New York Homeopathic Medical College and Flower Hospital, New York.
The Journal of General Physiology
|October 30, 2009
Summary
Salivary and E. coli maltase enzymes act as glucomaltases, specifically hydrolyzing maltose. Trypsin rapidly inactivates and digests maltase, highlighting its protein nature.
Area of Science:
- Enzymology
- Microbiology
- Biochemistry
Background:
- Maltase enzymes are crucial for carbohydrate metabolism.
- Understanding maltase specificity and stability is important for biochemical and medical applications.
Purpose of the Study:
- To characterize the substrate specificity of salivary and Escherichia coli (E. coli) maltase.
- To investigate the effect of trypsin on maltase activity and stability.
Main Methods:
- Enzyme assays were performed using maltose, alpha-methylglucoside, and sucrose as substrates.
- Treatment with trypsin was used to assess enzyme inactivation and digestion.
Main Results:
- Both salivary and E. coli maltases demonstrated specificity for maltose, classifying them as glucomaltases.
- Maltase activity was rapidly and completely abolished by trypsin, indicating susceptibility to proteolytic digestion.
Conclusions:
- Salivary and E. coli maltases are glucomaltases due to their specific hydrolysis of maltose.
- Maltase is a protein susceptible to inactivation and digestion by trypsin.
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