Signal propagation and regulation in the mating pheromone response pathway of the yeast Saccharomyces cerevisiae
1994
Bardwell, L. | Cook, J.G. | Inouye, C.J. | Thorner, J.
Extracellular signals can affect the rate of proliferation and the state of differentiation of eukaryotic cells. Signal transduction pathways have evolved to detect these signals at the plasma membrane, transmit them through the cytoplasm and into the nucleus, and thereby generate the appropriate changes in metabolism and transcription. Much attention has been focused recently on regulatory pathways of this sort that lead to activation of a family of protein kinases known as the mitogen- or messenger-activated, or extracellular signal-regulated protein kinases (MAPKs or ERKs) because this particular class of enzyme is highly conserved among eukaryotes, as is documented here and in the accompanying reviews in this issue. The mating pheromone response pathway in a unicellular microbe, the budding yeast Saccharomyces cerevisiae, is perhaps the best understood multicomponent signaling pathway known in any eukaryotic organism, especially at the genetic level. Furthermore, structural homologs and functional analogs of the components of the yeast pheromone response pathway are recapitulated in the signaling systems present in multicellular eukaryotes. This article emphasizes recent findings and common molecular themes for understanding the organization and regulation of MAPK-dependent signaling cascades that have emerged from biochemical and genetic analysis of the mating pheromone response pathway in yeast.
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