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. 1984 Apr;4(4):695–702. doi: 10.1128/mcb.4.4.695

Developmental changes in translatable RNA species associated with meiosis and spore formation in Saccharomyces cerevisiae.

E M Weir-Thompson, I W Dawes
PMCID: PMC368784  PMID: 6371495

Abstract

During Saccharomyces cerevisiae sporulation distinct changes in translatable mRNA species have been detected by two-dimensional gel electrophoresis of the polypeptides produced in a messenger-dependent, cell-free rabbit reticulocyte lysate primed with RNA prepared from a/alpha, a/a, and alpha/alpha isogenic diploids at different stages of sporulation. The availability of functional mRNA increased by about 25% during the first 4 h after transfer of either sporulating (a/alpha), or nonsporulating (a/a and alpha/alpha) diploids to sporulation medium. Thereafter functional mRNA decreased such that in the a/alpha strain after 24 h there was only about 50% of the amount in vegetative cells; a less marked decrease was observed in the a/a and alpha/alpha strains. Of 750 mRNA species detected, 43 underwent alterations only during sporulation in the a/alpha strain, whereas 36 changes were common to all three strains and one mRNA specific to alpha/alpha vegetative cells was detected. Only four of the sporulation-specific changes were due to the de novo appearance of translatable species, and two of these became predominant species of the total population. The majority of the specific changes were due to either permanent or transient increases in the concentration of individual mRNA species; 11 decreases were found. Changes were found at most stages of sporulation, although many occurred in either of two stages, one early (before 2 h) and the other later (between 6 and 8 h) when commitment to meiotic segregation was beginning. The results provide evidence for both quantitative and, to a lesser extent, qualitative transcriptional control of gene expression during sporulation.

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Selected References

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