Asymmetric Transcription Factor Partitioning During Yeast Cell Division Requires the FACT Chromatin Remodeler and Cell Cycle Progression. Issue 3 (1st November 2020)

• Record Type: Journal Article
• Authors: Herrero, Eva; Stinus, Sonia; Bellows, Eleanor; Berry, Lisa K; Wood, Henry; Thorpe, Peter H
• Is Part Of: Genetics. Volume 216:Issue 3(2020)
• Page Start: 701
• Page End: 716
• Publication Date: 2020-11-01
• Subjects: Ace2 -- asymmetry -- cell cycle; Genetics -- Periodicals; 576.5
• DOI: 10.1534/genetics.120.303439
• Languages: English
• ISSNs: 0016-6731

Abstract

Abstract: Most cell divisions are asymmetric with some cellular components distributed preferentially to one of the two nascent daughter cells. These asymmetries are typically important for the developmental fate of the resulting daughter cells. Herrero et al. describe ..... Abstract: The polarized partitioning of proteins in cells underlies asymmetric cell division, which is an important driver of development and cellular diversity. The budding yeast Saccharomyces cerevisiae divides asymmetrically, like many other cells, to generate two distinct progeny cells. A well-known example of an asymmetric protein is the transcription factor Ace2, which localizes specifically to the daughter nucleus, where it drives a daughter-specific transcriptional network. We screened a collection of essential genes to analyze the effects of core cellular processes in asymmetric cell division based on Ace2 localization. This screen identified mutations that affect progression through the cell cycle, suggesting that cell cycle delay is sufficient to disrupt Ace2 asymmetry. To test this model, we blocked cells from progressing through mitosis and found that prolonged metaphase delay is sufficient to disrupt Ace2 asymmetry after release, and that Ace2 asymmetry is restored after cytokinesis. We also demonstrate that members of the evolutionarily conserved facilitates chromatin transcription (FACT) chromatin-reorganizing complex are required for both asymmetric and cell cycle-regulated localization of Ace2, and for localization of the RAM network components.