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Encompassing Amino Acids: full length
Applications: Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling.
Assay Conditions: 5 mM MOPS, 2.5 mM β-glycerophosphate, 5 mM MgCl2, 1 mM EGTA, 0.4 mM EDTA, 0.05 mM DTT, 2 mM ATP. Incubate p70S6K with 0.2 mg/ml RSK-sub peptide substrate and 50 ?M [33P]-ATP at 30°C for 15 minutes, then spot reaction on phosphocellulose paper, fix in 1% phosphoric acid, and assay with a scintillation counter.
Background: p70S6Kb is a member of the RSK (ribosomal S6 kinase) family of serine/threonine kinases and is activated by mitogenic stimuli, including growth factors, cytokines, and phorbol esters. p70S6Kb contains 2 nonidentical kinase catalytic domains and phosphorylates the S6 ribosomal protein and eucaryotic translation initiation factor 4B. Phosphorylation of S6 leads to an increase in protein synthesis and cell proliferation. PI3 kinase pathway and mTOR are involved in the activation of p70S6Kb but other pathways can also activate this target protein.
Description: Recombinant humanp70S6Kb, also known as RPS6KB2,STK14B, KLS, P70-beta, or SRK,GenBank Accession No. BC_000094, fulllengthwith an N-terminal GST tag andexpressed in a baculovirus-infected Sf9insect cell expression system. MW = 85kDa.
Format: Aqueous buffer solution
Formulation: 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.
Genbank: BC000094
Host Cell Line: Sf9 cells
Purity: ≥90%
Storage Stability: At least 6 months at -80°C.
Tags: N-terminal GST-tag
Uniprot: Q9UBS0
Warnings: Avoid freeze/thaw cycles.
Biosafety Level: Not applicable (BSL-1)
References: 1. Gout, I. et al: Molecular cloning and characterization of a novel p70 S6 kinase, p70 S6 kinase beta containing a proline-rich region. J. Biol. Chem. 273: 30061-30064, 1998.
2. Saitoh, M. et al: Cloning and characterization of p70(S6K-beta) defines a novel family of p70 S6 kinases. Biochem. Biophys. Res. Commun. 253: 470-476, 1998.
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