Plasma membrane aminoglycerolipid flippase function is required for signaling competence in the yeast mating pheromone response pathway

Elodie Sartorel,Evelyne J. Barrey,R. Lau,J. Thorner

Published 2015 in Molecular Biology of the Cell

ABSTRACT

Flippases that catalyze interleaflet lipid transfer, as well as the stimulatory protein kinase Fpk1, localize to the shmoo tip. Although viable and near-normal morphologically, cells lacking these flippases fail to respond to pheromone due to derangements in PtdIns(4,5)P2 localization, with ensuing effects on the level and/or function of MAPK scaffold protein Ste5.

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