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Phospholipid deacylating activities included in yeast
T Morimoto1, H Oishi, Y Watanabe
1Department of Bioresources, Faculty of Agriculture, Ehime University, Japan.
Bioscience, Biotechnology, and Biochemistry
|October 3, 1998
Summary
Yeast possess diverse phospholipid deacylating enzymes, with many strains showing alkaline activity, challenging previous assumptions. Enzyme properties vary across species, indicating a need for further research into their physiological roles.
Area of Science:
- Biochemistry
- Microbiology
- Enzymology
Background:
- Yeast were previously thought to possess only one type of phospholipid deacylating enzyme.
- This enzyme was believed to function optimally in acidic conditions.
Purpose of the Study:
- To screen various yeast genera and strains for phospholipid deacylating activity.
- To investigate the enzymatic properties and genetic relatedness of these enzymes.
- To challenge the existing understanding of yeast phospholipid deacylating enzymes.
Main Methods:
- Screening of 8 yeast genera and 25 strains for enzyme activity.
- Utilized micellar and liposomal substrates for activity assays.
- Analyzed enzyme properties in relation to 18S rRNA gene sequences.
Main Results:
- Phospholipid deacylating activity was detected at pH 8.0 in 7 genera and 13 strains.
- Enzymatic properties did not correlate with genetic identity based on 18S rRNA.
- Significant variability in enzyme activity and properties was observed across different yeast species.
Conclusions:
- Yeast harbor a wider variety of phospholipid deacylating enzymes than previously known.
- Enzyme characteristics are species-dependent, not solely determined by genetic relatedness.
- Further investigation across diverse yeast species is crucial to elucidate the physiological functions of these enzymes.