Anti-p70 S6 Kinase: Rabbit p70 S6 Kinase Antibody

BACKGROUND The p70 S6 kinase was originally identified as a kinase that regulates serine phosphorylation of the 40 S ribosomal S6 protein, a major component of the machinery involved in protein synthesis in mammalian cells. This kinase is activated by numerous mitogens, growth factors, and hormones. Activation of p70S6K occurs through the phosphorylation at a number of sites. 

 

p70S6K activation has been implicated in cell cycle control, cell movement, and cell differentiation regulation.¹ It has been well demonstrated that the activation of p70 S6 kinase is regulated by the FKBP 12-rapamycin-associated protein (FRAP/ mTOR), whose activation is in turn regulated by the upstream activation of the phosphatidylinositol 3′-kinase pathway, typically activated upon stimulation of a cell with a growth factor (such as IGF-1).² Branched chain amino acids, such as leucine, are also sufficient for the activation of mTOR, resulting in an increase in p70S6K phosphorylation.³ On the other hand, AMPK plays important role in negatively regulating mTOR/p70 S6 kinase pathway.⁴
 

REFERENCES  

1. Pearson RB & Thomas G: Prog. Cell Cycle Res. 1:21-32, 1995.
2. Chung J et al.: Nature 370:71-75, 1994.
3. Ban H et al.: Int J Mol Med. 13:537-43, 2004.
4. Chan AYM & Dyck JRB: Can. J. Physiol. Pharmacol. 83:24–28, 2005.