Abstract
We analyzed the lipid compositions of a freeze-tolerant strain of yeast Torulaspora delbrueckii D2-4 and its freeze-sensitive mutant 60B3 to clarify the relationship between the lipid composition and freeze tolerance of yeast. The total lipid content of D2-4 was similar to that of 60B3, whereas the content of phospholipids and neutral lipids was different from those of 60B3. The molar ratio of sterol to phospholipid in D2-4 was 60% of that in 60B3. The analysis of lipid components indicated that D2-4 contained larger amounts of phosphatidylethanolamine, phosphatidylcholine, and phosphatidylinositol, but smaller amounts of triglyceride as compared to 60B3. These results suggest that the plasma membrane of freeze-tolerant strain D2-4 may have a higher fluidity than that of freeze-sensitive strain 60B3.
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Murakami, Y., Yokoigawa, K. & Kawai, H. Lipid composition of a freeze-tolerant yeast, Torulaspora delbureckii, and its freeze-sensitive mutant. Appl Microbiol Biotechnol 44, 167–171 (1995). https://doi.org/10.1007/BF00164497
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DOI: https://doi.org/10.1007/BF00164497