Q5YJC2 (GSK3B_SPECI) Reviewed, UniProtKB/Swiss-Prot
Last modified November 13, 2013. Version 63. History...
Names and origin
|Protein names||Recommended name:|
Glycogen synthase kinase-3 beta
Short name=GSK-3 beta
Serine/threonine-protein kinase GSK3B
|Organism||Spermophilus citellus (European suslik) (Citellus citellus)|
|Taxonomic identifier||9997 [NCBI]|
|Taxonomic lineage||Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Sciuridae › Xerinae › Marmotini › Spermophilus|
|Sequence length||420 AA.|
|Protein existence||Evidence at transcript level|
General annotation (Comments)
Constitutively active protein kinase that acts as a negative regulator in the hormonal control of glucose homeostasis, Wnt signaling and regulation of transcription factors and microtubules, by phosphorylating and inactivating glycogen synthase (GYS1 or GYS2), EIF2B, CTNNB1/beta-catenin, APC, AXIN1, DPYSL2/CRMP2, JUN, NFATC1/NFATC, MAPT/TAU and MACF1. Requires primed phosphorylation of the majority of its substrates. In skeletal muscle, contributes to insulin regulation of glycogen synthesis by phosphorylating and inhibiting GYS1 activity and hence glycogen synthesis. May also mediate the development of insulin resistance by regulating activation of transcription factors. Regulates protein synthesis by controlling the activity of initiation factor 2B (EIF2BE/EIF2B5) in the same manner as glycogen synthase. In Wnt signaling, GSK3B forms a multimeric complex with APC, AXIN1 and CTNNB1/beta-catenin and phosphorylates the N-terminus of CTNNB1 leading to its degradation mediated by ubiquitin/proteasomes. Phosphorylates JUN at sites proximal to its DNA-binding domain, thereby reducing its affinity for DNA. Phosphorylates NFATC1/NFATC on conserved serine residues promoting NFATC1/NFATC nuclear export, shutting off NFATC1/NFATC gene regulation, and thereby opposing the action of calcineurin. Phosphorylates MAPT/TAU on 'Thr-548', decreasing significantly MAPT/TAU ability to bind and stabilize microtubules. Plays an important role in ERBB2-dependent stabilization of microtubules at the cell cortex. Phosphorylates MACF1, inhibiting its binding to microtubules which is critical for its role in bulge stem cell migration and skin wound repair. Probably regulates NF-kappa-B (NFKB1) at the transcriptional level and is required for the NF-kappa-B-mediated anti-apoptotic response to TNF-alpha (TNF/TNFA). Negatively regulates replication in pancreatic beta-cells, resulting in apoptosis, loss of beta-cells. Phosphorylates MUC1 in breast cancer cells, decreasing the interaction of MUC1 with CTNNB1/beta-catenin. Is necessary for the establishment of neuronal polarity and axon outgrowth. Phosphorylates MARK2, leading to inhibit its activity. Phosphorylates SIK1 at 'Thr-182', leading to sustain its activity By similarity. Phosphorylates ZC3HAV1 which enhances its antiviral activity. Phosphorylates SFPQ upon T-cell activation. Phosphorylates SNAI1, leading to its BTRC-triggered ubiquitination and proteasomal degradation By similarity.
ATP + [tau protein] = ADP + [tau protein] phosphate.
ATP + a protein = ADP + a phosphoprotein.
Activated by phosphorylation at Tyr-216. In response to insulin, inhibited by phosphorylation at Ser-9 by PKB/AKT1; phosphorylation at this site causes a conformational change, preventing access of substrates to the active site. Inhibited by lithium By similarity.
Monomer By similarity. Interacts with ARRB2, AXIN1, CABYR, DISC1, MMP2, MUC1, NIN, PRUNE, SGK3 and ZBED3. Interacts with and phosphorylates SNAI1 By similarity. Found in a complex composed of MACF1, APC, AXIN1, CTNNB1 and GSK3B By similarity.
Cytoplasm By similarity. Nucleus By similarity. Cell membrane By similarity. Note: The phosphorylated form shows localization to cytoplasm and cell membrane. The MEMO1-RHOA-DIAPH1 signaling pathway controls localization of the phosphorylated form to the cell membrane By similarity.
Phosphorylated by AKT1 and ILK1. Upon insulin-mediated signaling, the activated PKB/AKT1 and RPS6KA3 protein kinases phosphorylate and desactivate GSK3B, resulting in the dephosphorylation and activation of GYS1. Activated by phosphorylation at Tyr-216 By similarity.
Mono-ADP-ribosylation by PARP10 negatively regulates kinase activity By similarity.
Contains 1 protein kinase domain.
Sequence annotation (Features)
|Feature key||Position(s)||Length||Description||Graphical view||Feature identifier|
|Chain||1 – 420||420||Glycogen synthase kinase-3 beta||PRO_0000250495|
|Domain||56 – 340||285||Protein kinase|
|Nucleotide binding||62 – 70||9||ATP By similarity|
|Active site||181||1||Proton acceptor By similarity|
|Binding site||85||1||ATP By similarity|
Amino acid modifications
|Modified residue||9||1||Phosphoserine; by PKB/AKT1, RPS6KA3 and SGK3 By similarity|
|Modified residue||216||1||Phosphotyrosine By similarity|
|Modified residue||389||1||Phosphoserine By similarity|
|Modified residue||390||1||Phosphothreonine By similarity|
|AY392021 mRNA. Translation: AAS59774.1.|
3D structure databases
|SMR||Q5YJC2. Positions 23-386. |
Protocols and materials databases
Family and domain databases
|InterPro||IPR011009. Kinase-like_dom. |
|Pfam||PF00069. Pkinase. 1 hit. |
|SMART||SM00220. S_TKc. 1 hit. |
|SUPFAM||SSF56112. SSF56112. 1 hit. |
|PROSITE||PS00107. PROTEIN_KINASE_ATP. 1 hit. |
PS50011. PROTEIN_KINASE_DOM. 1 hit.
PS00108. PROTEIN_KINASE_ST. 1 hit.
|Accession||Primary (citable) accession number: Q5YJC2|
|Entry status||Reviewed (UniProtKB/Swiss-Prot)|
|Annotation program||Chordata Protein Annotation Program|
Index of protein domains and families