Networking with mitogen-activated protein kinases
- 1 November 1993
- journal article
- review article
- Published by Springer Nature in Molecular and Cellular Biochemistry
- Vol. 127-128 (1) , 157-169
- https://doi.org/10.1007/bf01076767
Abstract
Mitogen activated protein (MAP) kinases and their target ribosomal protein S6 (RSK) kinases have been recognized as shared components in the intracellular signaling pathways of many diverse cytokines. Recent studies have extended this protein kinase cascade by identifying the major activator of vertebrate MAP kinases as a serine/threonine/tyrosine-protein kinase called MEK, which is related to yeast mating factor-regulated protein kinases encoded by the STE7 and byr1 genes. MEK, in turn, may be activated following its phosphorylation on serine by either of the kinases encoded by proto-oncogenesraf1 ormos, as well as by p78 mekk , which is related to the yeast STE11 and byr2 gene products. Isoforms of all of these protein kinases may specifically combine to assemble distinct modules for intracellular signal transmission. However, the fundamental architecture of these protein kinase cascades has been highly conserved during eukaryotic evolution.Keywords
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