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. 1981 Nov;1(11):1016–1023. doi: 10.1128/mcb.1.11.1016

Hierarchy of elements regulating synthesis of ribosomal proteins in Saccharomyces cerevisiae.

D R Kief, J R Warner
PMCID: PMC369723  PMID: 7050662

Abstract

Saccharomyces cerevisiae cells respond to a heat shock by temporarily slowing the synthesis of ribosomal proteins (C. Gorenstein and J. R. Warner, Proc. Natl. Acad. Sci. U.S.A. 73:1574-1551, 1976). When cultures growing oxidatively on ethanol as the sole carbon source were shifted from 23 to 36 degrees C, the synthesis of ribosomal proteins was coordinately inhibited twice as rapidly and 45% more severely than in comparable cultures growing fermentatively on glucose. Within 15 min, the relative rates of synthesis of at least 30 ribosomal proteins declined to less than one-sixth their initial values, whereas the overall rate of protein synthesis increased at least threefold. We suggest that this is due primarily to controls at the level of synthesis of messenger ribonucleic acid for ribosomal proteins but may also involve changes in messenger ribonucleic acid stability. In contrast, a nutritional shift-up causes a stimulation of the synthesis of ribosomal proteins. Experiments designed to determine the hierarchy of stimuli affecting the synthesis of these proteins demonstrated that temperature shock was dominant to glucose stimulation. When a culture growing on ethanol was shifted from 23 to 36 degrees C and glucose was added shortly afterward, the decline in ribosomal protein synthesis continued unabated. However, in wild-type cells ribosomal protein synthesis began to recover within 15 min. In mutants temperature sensitive for ribosome synthesis, e.g., rna2, there was no recovery in the synthesis of most ribosomal proteins, suggesting that the product of rna2 is essential for the production of these proteins under all vegetative conditions.

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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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