RRC ID 12639
著者 Motizuki M, Xu Z.
タイトル Importance of polarisome proteins in reorganization of actin cytoskeleton at low pH in Saccharomyces cerevisiae.
ジャーナル J Biochem
Abstract The actin cytoskeleton of the yeast Saccharomyces cerevisiae can be altered rapidly in response to external cues. We reported previously that S. cerevisiae responds to low-pH stress by transiently depolarizing its actin cytoskeleton, and that this step requires a mitogen-activated protein kinase, high osmolarity glycerol 1 (Hog1p). This study further investigated the components involved in this actin reorganization at pH 3.0. Gene deletions on the Sln1p branch of the HOG pathway completely blocked actin depolarization, suggesting that Hog1p activation depends mainly on the osmosensor Sln1p. The protein-synthesis inhibitor cycloheximide did not influence the time course of actin depolarization, suggesting that the depolarization is a direct effect of the HOG pathway. Deletion of the scaffolding protein, Spa2p, or the Spa2p-interacting protein Pea2p, markedly inhibited the depolarization, and further deletion of the formin protein, Bni1p, notably delayed actin repolarization. Our results suggest the involvement of polarisome proteins, such as Spa2p, Pea2p and Bni1p, but not Bud6p, in Hog1p-dependent reorganization of the yeast actin cytoskeleton at low pH.
巻・号 146(5)
ページ 705-12
公開日 2009-11-1
DOI 10.1093/jb/mvp116
PII mvp116
PMID 19633059
MeSH Actins / metabolism* Cell Polarity* / drug effects Colony Count, Microbial Cycloheximide / pharmacology Cytoskeleton / drug effects Cytoskeleton / metabolism* Hydrogen-Ion Concentration / drug effects Mutation / genetics Protein Transport / drug effects Saccharomyces cerevisiae / cytology* Saccharomyces cerevisiae / drug effects Saccharomyces cerevisiae / metabolism* Saccharomyces cerevisiae Proteins / metabolism* Signal Transduction / drug effects Subcellular Fractions / drug effects Subcellular Fractions / metabolism Temperature
IF 2.476
引用数 4
WOS 分野 BIOCHEMISTRY & MOLECULAR BIOLOGY
リソース情報
酵母 NA