BY4741 cannot enter quiescence from rich medium
Shawna Miles1
, Cameron Lee2, and Linda Breeden1§
1Basic Science, Fred Hutchinson Cancer Center, Seattle, Washington, United States
2Tune Therapeutics, 1930 Boren Ave., Seattle, Washington, United States
§Correspondence to: Linda Breeden (lbreeden@fredhutch.org)
Abstract
In rich medium, W303 Saccharomyces cerevisiae begins to accumulate in G1 an hour before it exhausts the available glucose. It undergoes one more asymmetrical cell division, then stops dividing in G1. In contrast, BY4741, stops dividing four hours before glucose exhaustion, at one-fourth the cell density achieved by W303. There is no asymmetrical cell division and only 50% of the cells arrest in G1. We conclude that BY4741 growth is not limited by glucose and they do not go through the stereotypical events carried out by other strains as they enter quiescence from rich medium. In W303, the timing of glucose limitation and the transition to quiescence is correlated with the rate of biomass accumulation and cell doubling time.
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