RAS MEDIATES NERVE GROWTH-FACTOR RECEPTOR MODULATION OF 3 SIGNAL-TRANSDUCING PROTEIN-KINASES - MAP KINASE, RAF-1, AND RSK

被引:906
|
作者
WOOD, KW
SARNECKI, C
ROBERTS, TM
BLENIS, J
机构
[1] HARVARD UNIV, SCH MED, DANA FARBER CANC INST, DIV CELLULAR & MOLEC BIOL, BOSTON, MA 02115 USA
[2] HARVARD UNIV, SCH MED, DEPT CELLULAR & MOLEC PHYSIOL, BOSTON, MA 02115 USA
关键词
D O I
10.1016/0092-8674(92)90076-O
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
p21c-ras plays a critical role in mediating tyrosine kinase-stimulated cell growth and differentiation. However, the pathways through which p21c-ras propagates these signals remain unknown. We report that in PC12 cells, expression of a dominant inhibitory mutant of ras, c-Ha-ras(Asn-17), antagonizes growth factor- and phorbol ester-induced activation of the erk-encoded family of MAP kinases, the 85-92 kd RSKs, and the kinase(s) responsible for hyperphosphorylation of the proto-oncogene product Raf-1. In addition, we find that expression of the activated ras oncogene is sufficient to stimulate these events. These data indicate that ras mediates nerve growth factor receptor and protein kinase C modulation of MAP kinases, RSKs, and Raf-1.
引用
收藏
页码:1041 / 1050
页数:10
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