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p70 S6K, Active

based on 1 citations in multiple journalsp70 S6K, Active14.1 4
Increases protein synthesis and cell proliferation
Catalog #: 7725
SKU-Size Size Price Qty
7725-5 5 μg
$295.00
7725-100 100 μg
$3,950.00
More Sizes Get Quote

Product Details

Alternate Name p70, Ribosomal protein S6 kinase beta-1, Serine/threonine-protein kinase 14A
Gene Symbol PS6K
Gene ID 6198
Accession # P23443
Source Baculovirus (Sf9 insect cells)
Appearance Liquid
Physical Form Description Recombinant protein in storage buffer (50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 0.25 mM DTT, 0.1 mM EGTA, 0.1 mM EDTA, 0.1 mM PMSF, 25% glycerol).
Molecular Weight 76.0 kDa
Purity by SDS-PAGE ≥90%
Handling Centrifuge the vial prior to opening.
Storage Conditions -80°C
Shipping Conditions Dry Ice
USAGE For Research Use Only! Not to be used in humans

Details

Activation of cell growth leads to the multiple phosphorylation of 40S ribosomal protein S6. The kinase responsible for controlling this event is termed p70S6K (1). Northern blot analysis shows p70S6K to be ubiquitously expressed in human adult tissues. p70S6K is activated by serum stimulation, and the serum-induced activation is inhibited by wortmannin and rapamycin. p70S6k activity undergoes changes in the cell cycle and increases 20-fold in G1 cells released from G0 (2). The kinase is reactivated 10-fold when cells released from a nocodazole-induced metaphase block enter G1 of the next cell cycle. The immunosuppressive agent rapamycin induces inactivation of p70s6k with no effect on other mitogen-activated kinases (3). The principal target of rapamycin-induced p70s6k inactivation is T389 site on p70S6K, which is located in an unusual hydrophobic sequence outside the catalytic domain. Mutation of T389 to alanine ablates kinase activity, whereas mutation to glutamic acid confers constitutive kinase activity and rapamycin resistance. p70S6K activation by growth factor requires phosphorylation by various inputs on multiple sites (4). p70S6K activation requires sequential phosphorylations at proline-directed residues in the putative autoinhibitory pseudosubstrate domain, as well as threonine 389. Threonine 229, a site in the catalytic loop is phosphorylated by phosphoinositide-dependent kinase 1 (PDK-1). Activation of p70S6K requires a phosphoinositide 3-kinase (PI3-K)-dependent signal(s).


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Lustig, Y. et. al. Separation of the gluconeogenic and mitochondrial functions of PGC-1α through S6 kinase. Genes & Dev., Jun 2011; 25: 1232 - 1244.
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