Relative levels of RNA polII subunits differentially affect starvation response in budding yeast.

Abstract:

:The Rpb4/7 subcomplex of RNA polymerase II in Saccharomyces cerevisiae is known to play an important role in stress response and stress survival. These two proteins perform overlapping functions ensuring an appropriate cellular response through transcriptional regulation of gene expression. Rpb4 and Rpb7 also perform many cellular functions either together or independent of one another. Here, we show that Rpb4 and Rpb7 differently affect during the nutritional starvation response pathways of sporulation and pseudohyphae formation. Rpb4 enhances the cells' proficiency to sporulate but suppresses pseudohyphal growth. On the other hand, Rpb7 promotes pseudohyphal growth and suppresses sporulation in a dose-dependent manner. We present a model whereby the stoichiometry of Rpb4 and Rpb7 and their relative levels in the cell play a switch like role in establishing either sporulation or pseudohyphal gene expression.

authors

Singh SR,Pillai B,Balakrishnan B,Naorem A,Sadhale PP

doi

10.1016/j.bbrc.2007.02.120

subject

Has Abstract

pub_date

2007-04-27 00:00:00

pages

266-72

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(07)00426-3

journal_volume

356

pub_type

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