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Purification and characterization of an extracellular beta-n-acetylhexosaminidase from Paecilomyces persicinus
Abstract:
Both beta-N-acetylglucosaminidase nad beta-N-acetylgalactosaminidase activities were detected in the culture fluids of Paecilomyces persicinus P-10 after growth in a soybean meal-corn meal medium. The active material was purified by means of protamine sulfate fractionation and ultrafiltration, followed by ion exchange and gel chromatography. The ratio of the two activities remained constant throughout the purification, and the final product was shown to migrate as a single band by using gel isoelectric focusing, disc electrophoresis, and detergent gel electrophoresis. Temperature, pH, inhibition, and kinetic studies were performed to characterize both activities. The molecular weight of the enzyme was estimated to be about 100,000 by high-resolution gel chromatography. Based on the data obtained, it is suggested that both beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase activities reside in the same protein.
Insights
This study identified beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase activities in Paecilomyces persicinus P-10. These enzymes appear to be located on the same protein, suggesting a single enzyme with dual functionality.
Area of Science:
- Microbiology
- Enzymology
- Biochemistry
Background:
- Paecilomyces persicinus P-10 is a fungus known to produce various enzymes.
- Glycosidases, such as beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase, play crucial roles in biological processes.
Purpose of the Study:
- To investigate the presence and characteristics of beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase activities in Paecilomyces persicinus P-10.
- To determine if these two enzymatic activities originate from the same protein.
Main Methods:
- Enzyme purification using protamine sulfate fractionation, ultrafiltration, ion exchange, and gel chromatography.
- Enzyme characterization through temperature, pH, inhibition, and kinetic studies.
- Analysis of enzyme homogeneity using gel isoelectric focusing, disc electrophoresis, and detergent gel electrophoresis.
Main Results:
- Both beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase activities were detected and purified from the culture fluid.
- The ratio of the two activities remained constant during purification, and the final product showed a single band on multiple electrophoresis techniques.
- The molecular weight was estimated to be approximately 100,000 Da.
Conclusions:
- The data strongly suggest that beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase activities are associated with the same protein in Paecilomyces persicinus P-10.
- This finding indicates a single enzyme possessing dual glycosidase functions.