TY - JOUR
T1 - Activation of mitogen-activated protein kinase cascades by p21-activated protein kinases in cell-free extracts of Xenopus oocytes
AU - Polverino, Anthony
AU - Frost, Jeff
AU - Yang, Peirong
AU - Hutchison, Michele
AU - Neiman, Aaron M.
AU - Cobb, Melanie H.
AU - Marcus, Stevan
PY - 1995/11/3
Y1 - 1995/11/3
N2 - In the evolutionarily distant yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe, genetic evidence suggests that activation of pheromone-induced mitogen-activated protein kinase (MAPK) cascades involves the function of the p21(cdc42/rac1)-activated protein kinases (PAKs) Ste20 and Shk1, respectively. In this report, we show that purified Ste20 and Shk1 were each capable of inducing p42(MAPK) activation in cell-free extracts of Xenopus laevis oocytes, while a mammalian Ste20/Shk1-related protein kinase, p65(pak) (Pak1), did not induce activation of p42(MAPK). In contrast to p42(MAPK), activation of JNK/SAPK in Xenopus oocyte extracts was induced by both the yeast Ste20 and Shk1 kinases, as well as by mammalian Pak1. Our results demonstrate that MAPK cascades that are responsive to PAKs are conserved in higher eukaryotes and suggest that distinct PAKs may regulate distinct MAPK modules.
AB - In the evolutionarily distant yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe, genetic evidence suggests that activation of pheromone-induced mitogen-activated protein kinase (MAPK) cascades involves the function of the p21(cdc42/rac1)-activated protein kinases (PAKs) Ste20 and Shk1, respectively. In this report, we show that purified Ste20 and Shk1 were each capable of inducing p42(MAPK) activation in cell-free extracts of Xenopus laevis oocytes, while a mammalian Ste20/Shk1-related protein kinase, p65(pak) (Pak1), did not induce activation of p42(MAPK). In contrast to p42(MAPK), activation of JNK/SAPK in Xenopus oocyte extracts was induced by both the yeast Ste20 and Shk1 kinases, as well as by mammalian Pak1. Our results demonstrate that MAPK cascades that are responsive to PAKs are conserved in higher eukaryotes and suggest that distinct PAKs may regulate distinct MAPK modules.
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U2 - 10.1074/jbc.270.44.26067
DO - 10.1074/jbc.270.44.26067
M3 - Article
C2 - 7592806
AN - SCOPUS:0028846513
SN - 0021-9258
VL - 270
SP - 26067
EP - 26070
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 44
ER -