Product Name: GSK3a (16-24) pT19+pS21
Product Number: PE-04AMR99
Size: 200 µg      Price:68.00
1 mg      $US136.00
5 mg      297.00
Peptide Name: GSK3a (16-24) pT19+pS21

Product Use: Services as a blocking peptide for use with the GSK3a-pT19+pS21 rabbit polyclonal antibody (Cat. No.: AB-PK648) that is also available from Kinexus. This phosphopeptide may also be useful as a substrate for screening the phosphatase activity of protein phosphatases. The peptide sequence is located near the N-terminus of the protein. Phosphorylation inhibits phosphotransferase activity.

Peptide Production Method: Solid-phase peptide synthesis

Peptide Origin: Homo sapiens

Peptide Sequence: RAR-pT-S-pS-FAE

Peptide Modifications N Terminus: Free amino

Peptide Modifications C Terminus: βAla-Cys

Peptide Modifications Other: Phosphorylated

Peptide Molecular Mass Calculated: 1358.27 Da

Peptide Purity Percent after Synthesis and Purification: >95

Peptide Appearance: White powder

Peptide Form: Solid

Storage Conditions: -20°C

Related Product 1: GSK3a - pT19+pS21 phosphosite-specific antibody (Cat. No.: AB-PK648)

Scientific Background: GSK3a is a protein-serine/threonine kinase of the CMGC group and GSK family. It is highly active following tyrosine phosphorylation within its activation T loop. Phosphorylation at Y279 increases phosphotransferase activity and promotes nuclear localization. Phosphorylation at S21 inhibits phosphotransferase activity. Through direct phosphorylation, it can inactivate glycogen synthase (for insulin regulation), CTNNB1/beta-catenin, APC, and AXIN1. GSK3 has been proposed as a tumour suppressor protein (TSP), since with loss of GSK3 there is an increase in WNT signalling, with a beta-catenin stabilization, leading to tumourigenesis. GSK3 has also been proposed to act as an oncoprotein (OP), as acute leukemia required GSK3 for cell proliferation. In most human cancers, it is up-regulated in expression about 1.6-times the rate observed for most protein kinases.