Description_x000D_ General description_x000D_ Glycogen Synthase Kinase 3β (GSK3β) is one of the two isoforms of GSK3 enzyme, both of which are encoded by different genes. This protein is predominantly cytoplasmic, but is also found to be localized to nucleus and mitochondria. It is a protein-serine kinase. This protein contains a protein kinase domain in its core, and is composed of 482 amino acids with a molecular weight of 46,712Da. It shows a wide range of tissue expression with the highest expression in brain._x000D_ Application_x000D_ Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling._x000D_ Biochem/physiol Actions_x000D_ Glycogen Synthase Kinase 3β (GSK3β) is responsible for rapid cyclin D1 turnover by phosphorylating it on Thr-286. It functions as a negative regulator of Wnt signaling during embryonic development and cell proliferation in adult tissues. This protein phosphorylates and regulates multiple proteins such as glycogen synthase, insulin receptor substrate-1, axin and APC (adenomatous polyposis coli). This protein is also shown to interact with multiple protein which are linked with Alzheimer’s disease (AD).