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GRK2 a ubiquitous protein kinase of the GRK family. Phosphorylates the beta-2-adrenergic receptor and related G-protein-coupled receptors. Appears to mediate agonist-specific desensitization observed at high agonist concentrations. Expression level is consistently elevated in chronic human heart failure. Mouse models of severe heart failure have been used to demonstrate that inhibition of BARK1 with a peptide inhibitor is sufficient to increase mean survival, reduce dialation and improve cardiac function. Note: This description may include information from UniProtKB.
Protein type: AGC group; BARK subfamily; EC; GRK family; Kinase, protein; Protein kinase, AGC; Protein kinase, Ser/Thr (non-receptor)
Chromosomal Location of Human Ortholog: 11q13.2
Cellular Component: cilium; cytoplasm; cytosol; membrane; plasma membrane
Molecular Function: alpha-2A adrenergic receptor binding; ATP binding; beta-adrenergic receptor kinase activity; Edg-2 lysophosphatidic acid receptor binding; G-protein coupled receptor kinase activity; protein binding; protein kinase activity
Biological Process: cardiac muscle contraction; desensitization of G-protein coupled receptor protein signaling pathway; entry of virus into host cell; G-protein coupled acetylcholine receptor signaling pathway; G-protein coupled receptor signaling pathway; heart development; negative regulation of striated muscle contraction; negative regulation of the force of heart contraction by chemical signal; peptidyl-serine phosphorylation; peptidyl-threonine phosphorylation; positive regulation of catecholamine secretion; receptor internalization; tachykinin signaling pathway; viral genome replication
Reference #:  P25098 (UniProtKB)
Alt. Names/Synonyms: ADRBK1; adrenergic, beta, receptor kinase 1; ARBK1; BARK; BARK1; Beta-adrenergic receptor kinase 1; Beta-ARK-1; BETA-ARK1; FLJ16718; G-protein coupled receptor kinase 2; GRK2
Gene Symbols: GRK2
Molecular weight: 79,574 Da
Basal Isoelectric point: 6.89  Predict pI for various phosphorylation states
CST Pathways:  GPCR Signaling to MAPKs
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