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. 1968 Nov;96(5):1632–1639. doi: 10.1128/jb.96.5.1632-1639.1968

Cellular Localization of Acetyl-Coenzyme A Synthetase in Yeast

Harold P Klein 1, Linda Jahnke 1
PMCID: PMC315221  PMID: 5726305

Abstract

In cells of Saccharomyces cerevisiae grown with glucose in standing cultures, the microsomal fraction had the highest specific activity for acetyl-coenzyme A synthetase and contained the greatest fraction of the total activity regardless of when the cells were harvested during growth. The addition of acetate did not affect the distribution of the enzyme, nor did subsequent aeration of such cells in phosphate buffer even in the presence of glucose, acetate, or succinate. In cells grown aerobically, however, the microsomal fraction had the highest specific activity and the greatest fraction of the total activity only until the cells reached the stationary phase. After this time, most of the activity was associated with the mitochondrial fraction. Finally, 3 or 4 days after inoculation, this fraction appeared to lose most of the enzyme to the microsomal and soluble fractions. Chloramphenicol, at concentrations that interfered with respiration but not with fermentation, prevented the association of acetyl-coenzyme A synthetase with the mitochondrial fraction in aerated cells, but it did not appreciably affect the large increases in enzyme activity observed during aerobic incubation. Cells grown with glucose under strict anaerobic conditions contained barely detectable amounts of acetyl-coenzyme A synthetase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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