Nov 4, 2018

Perturbations of transcription and gene expression-associated processes alter distribution of cell size values in Saccharomyces cerevisiae

BioRxiv : the Preprint Server for Biology
Nairita MaitraMichael Polymenis

Abstract

The question of what determines whether cells are big or small has been the focus of many studies because it is thought that such determinants underpin the coupling of cell growth with cell division. In contrast, what determines the overall pattern of how cell size is distributed within a population of wild type or mutant cells has received little attention. Knowing how cell size varies around a characteristic pattern could shed light on the processes that generate such a pattern and provide a criterion to identify its genetic basis. Here, we show that cell size values of wild type Saccharomyces cerevisiae cells fit a gamma distribution, in haploid and diploid cells, and under different growth conditions. To identify genes that influence this pattern, we analyzed the cell size distributions of all single-gene deletion strains in Saccharomyces cerevisiae . We found that yeast strains which deviate the most from the gamma distribution are enriched for those lacking gene products functioning in gene expression, especially those in transcription or transcription-linked processes. We also show that cell size is increased in mutants carrying altered activity substitutions in Rpo21p/Rpb1, the largest subunit of RNA polymerase II (Pol ...Continue Reading

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Mentioned in this Paper

Study
RNA Polymerase II
Size
Patterns
Genes
Saccharomyces cerevisiae allergenic extract
DNA-Directed RNA Polymerase
Transcription, Genetic
Cell Division
Transcription Process

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