G protein-coupled receptor kinases are a family of protein kinases within the AGC group of kinases. Like all AGC kinases, GRKs use ATP to add phosphate to Serine and Threonine residues in specific locations of target proteins. In particular, GRKs phosphorylate intracellular domains of G protein-coupled receptors (GPCRs). GRKs function in tandem with arrestin proteins to regulate the sensitivity of GPCRs for stimulating downstream heterotrimeric G protein and G protein-independent signaling pathways.
A serine/threonine protein kinase is a kinase enzyme, in particular a protein kinase, that phosphorylates the OH group of the amino-acid residues serine or threonine, which have similar side chains. At least 350 of the 500+ human protein kinases are serine/threonine kinases (STK).
G-protein-coupled receptor kinase 2 (GRK2) is an enzyme that in humans is encoded by the ADRBK1 gene. GRK2 was initially called Beta-adrenergic receptor kinase, and is a member of the G protein-coupled receptor kinase subfamily of the Ser/Thr protein kinases that is most highly similar to GRK3(βARK2).
Rhodopsin kinase is a serine/threonine-specific protein kinase involved in phototransduction. This enzyme catalyses the following chemical reaction:
In enzymology, a [3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring)] is an enzyme that catalyzes the chemical reaction
In enzymology, a [acetyl-CoA carboxylase] kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a dephospho-[reductase kinase] kinase is an enzyme that catalyzes the chemical reaction
In enzymology, an elongation factor 2 kinase is an enzyme that catalyzes the chemical reaction:
In enzymology, a glycerate kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a Goodpasture-antigen-binding protein kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a homoserine kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a [isocitrate dehydrogenase (NADP+)] kinase (EC 2.7.11.5) is an enzyme that catalyzes the chemical reaction:
In enzymology, a low-density-lipoprotein receptor kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a myosin-heavy-chain kinase is an enzyme that catalyzes the chemical reaction
Receptor protein serine/threonine kinases are enzyme-linked receptors that belong to protein-serine/threonine kinases. The systematic name of this enzyme class is ATP:[receptor-protein] phosphotransferase. Proteins from this group participate in 7 metabolic pathways: MAPK signaling pathway, cytokine-cytokine receptor interaction, TGF beta signaling pathway, adherens junction, colorectal cancer, pancreatic cancer, and chronic myeloid leukemia.
In enzymology, a tau-protein kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a tropomyosin kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a [tyrosine 3-monooxygenase] kinase is an enzyme that catalyzes the chemical reaction
This gene encodes a member of the G protein-coupled receptor kinase subfamily of the Ser/Thr protein kinase family, and is most highly similar to GRK4 and GRK5. The protein phosphorylates the activated forms of G protein-coupled receptors to regulate their signaling.
G-protein-coupled receptor kinase 3 (GRK3) is an enzyme that in humans is encoded by the ADRBK2 gene. GRK3 was initially called Beta-adrenergic receptor kinase 2 (βARK-2), and is a member of the G protein-coupled receptor kinase subfamily of the Ser/Thr protein kinases that is most highly similar to GRK2.
