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[Alliinase: purification and chief physico-chemical properties]
Biokhimiia (Moscow, Russia)
|October 1, 1978
Summary
A new method purifies garlic alliinase (enzyme) with 67x higher activity. This highly pure enzyme, with a molecular weight of 130,000, shows specific characteristics for pyridoxal-P binding and substrate interaction.
Area of Science:
- Biochemistry
- Enzymology
Background:
- Alliinase is a key enzyme found in garlic bulbs.
- Understanding its properties is crucial for biochemical applications.
Purpose of the Study:
- To develop an effective purification method for garlic alliinase.
- To characterize the biochemical properties of the purified enzyme.
Main Methods:
- Enzyme purification from garlic bulbs.
- Polyacrylamide gel electrophoresis for purity assessment.
- Spectroscopic analysis (absorption and circular dichroism).
Main Results:
- Achieved a 67-fold increase in specific activity.
- Obtained homogeneous enzyme preparations with 25% total activity yield.
- Determined molecular weight (130,000 Da), subunit composition, isoelectric point (pI 6.2), and pyridoxal phosphate binding.
Conclusions:
- The developed method yields highly pure and active alliinase.
- The purified enzyme exhibits characteristics typical of pyridoxal-P-dependent enzymes.
- Key kinetic parameters, including Km for alliin, were determined.