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Glycogen synthase kinase-3 beta

Glycogen synthase kinase-3 beta, (GSK-3 beta), is an enzyme that in humans is encoded by the GSK3B gene. In mice, the enzyme is encoded by the Gsk3b gene. Abnormal regulation and expression of GSK-3 beta is associated with an increased susceptibility towards bipolar disorder.

Function
Glycogen synthase kinase-3 (GSK-3) is a proline-directed serine-threonine kinase that was initially identified as a phosphorylating and an inactivating agent of glycogen synthase. Two isoforms, alpha (GSK3A) and beta, show a high degree of amino acid homology. ==Disease relevance==
Disease relevance
Homozygous disruption of the Gsk3b locus in mice results in embryonic lethality during mid-gestation. ==Signaling pathways==
Signaling pathways
Pharmacological inhibition of ERK1/2 restores GSK-3 beta activity and protein synthesis levels in a model of tuberous sclerosis. ==Interactions==
Interactions
GSK3B has been shown to interact with: • KIAA1211LATP2A2AKAP11, • AXIN2, • AR, • CTNNB1, • DNM1L, • MACF1MUC1, • SMAD3NOTCH1, • NOTCH2, • P53, • PRKAR2A, • SGK3, and • TSC2. . ==See also==
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