期刊
JOURNAL OF FUNGI
卷 8, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/jof8010032
关键词
fission yeast; MAPK; Cell Integrity Pathway; stress
This review provides an overview of the organization and underlying regulatory mechanisms of the Cell Integrity Pathway (CIP) in Schizosaccharomyces pombe, a simple eukaryote. It discusses the diverse functions of this pathway in mRNA stability, calcium homeostasis, cell wall integrity, and cytokinesis. Additionally, it explores the intricate interplay between the CIP and other environmentally regulated pathways. The evolutionary conservation of CIP signaling in the dimorphic fission yeast S. japonicus is also addressed.
The survival of eukaryotic organisms during environmental changes is largely dependent on the adaptive responses elicited by signal transduction cascades, including those regulated by the Mitogen-Activated Protein Kinase (MAPK) pathways. The Cell Integrity Pathway (CIP), one of the three MAPK pathways found in the simple eukaryote fission of yeast Schizosaccharomyces pombe, shows strong homology with mammalian Extracellular signal-Regulated Kinases (ERKs). Remarkably, studies over the last few decades have gradually positioned the CIP as a multi-faceted pathway that impacts multiple functional aspects of the fission yeast life cycle during unperturbed growth and in response to stress. They include the control of mRNA-stability through RNA binding proteins, regulation of calcium homeostasis, and modulation of cell wall integrity and cytokinesis. Moreover, distinct evidence has disclosed the existence of sophisticated interplay between the CIP and other environmentally regulated pathways, including Stress-Activated MAP Kinase signaling (SAPK) and the Target of Rapamycin (TOR). In this review we present a current overview of the organization and underlying regulatory mechanisms of the CIP in S. pombe, describe its most prominent functions, and discuss possible targets of and roles for this pathway. The evolutionary conservation of CIP signaling in the dimorphic fission yeast S. japonicus will also be addressed.
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