Biology:Tau-protein kinase
| tau-protein kinase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
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| Identifiers | |||||||||
| EC number | 2.7.11.26 | ||||||||
| CAS number | 111694-09-8 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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In enzymology, a tau-protein kinase (EC 2.7.11.26) is an enzyme that catalyzes the chemical reaction
- ATP + tau protein [math]\displaystyle{ \rightleftharpoons }[/math] ADP + O-phospho-tau-protein
Thus, the two substrates of this enzyme are ATP and tau protein, whereas its two products are ADP and O-phospho-tau-protein.
This enzyme belongs to the family of transferases, specifically, those transferring a phosphate group to the sidechain oxygen atom of serine or threonine residues in proteins (protein-serine/threonine kinases). This enzyme participates in 14 metabolic pathways: erbb signaling pathway, cell cycle, wnt signaling pathway, hedgehog signaling pathway, axon guidance, focal adhesion, b cell receptor signaling pathway, insulin signaling pathway, melanogenesis, alzheimer's disease, colorectal cancer, endometrial cancer, prostate cancer, and basal cell carcinoma.
Nomenclature
The systematic name of this enzyme class is ATP:[tau-protein] O-phosphotransferase. Other names in common use include ATP:tau-protein O-hosphotransferase, brain protein kinase PK40erk, cdk5/p20, CDK5/p23, glycogen synthase kinase-3beta, GSK, protein tau kinase, STK31, tau kinase, [tau-protein] kinase, tau-protein kinase I, tau-protein kinase II, tau-tubulin kinase, TPK, TPK I, TPK II, and TTK.
Structural studies
As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes 2JDO, 2JDR, and 2UW9.
Examples
Human genes encoding proteins with Tau-protein kinase activity include:
References
- "A novel tubulin-dependent protein kinase forming a paired helical filament epitope on tau". J. Biochem. (Tokyo) 104 (3): 319–21. September 1988. doi:10.1093/oxfordjournals.jbchem.a122465. PMID 2467901.
- "Characterization of the in vitro phosphorylation of human tau by tau protein kinase II (cdk5/p20) using mass spectrometry". J. Neurochem. 76 (4): 1221–32. 2001. doi:10.1046/j.1471-4159.2001.00130.x. PMID 11181841.
- Takashima A; Mercken, M; Murayama, M; Noguchi, K; Ishiguro, K; Imahori, K; Takashima, A (1998). "Characterization of tau phosphorylation in glycogen synthase kinase-3beta and cyclin dependent kinase-5 activator (p23) transfected cells". Biochim. Biophys. Acta 1380 (2): 177–82. doi:10.1016/s0304-4165(97)00139-6. PMID 9565682.
- "Expression, purification and crystallization of human tau-protein kinase I/glycogen synthase kinase-3beta". Acta Crystallogr. D 56 (Pt 11): 1464–5. November 2000. doi:10.1107/S0907444900010386. PMID 11053853.
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