This product is an active protein and may elicit a biological response in vivo, handle with caution.
G protein-coupled receptor kinase 1
FunctionRetina-specific kinase involved in the signal turnoff via phosphorylation of rhodopsin (RHO), the G protein- coupled receptor that initiates the phototransduction cascade. This rapid desensitization is essential for scotopic vision and permits rapid adaptation to changes in illumination.
Tissue specificityRetinal-specific. Expressed in rods and cones cells.
Involvement in diseaseNight blindness, congenital stationary, Oguchi type 2
Sequence similaritiesBelongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. GPRK subfamily. Contains 1 AGC-kinase C-terminal domain. Contains 1 protein kinase domain. Contains 1 RGS domain.
Post-translational modificationsAutophosphorylated, Ser-21 is a minor site of autophosphorylation compared to Ser-491 and Thr-492 (By similarity). Phosphorylation at Ser-21 is regulated by light and activated by cAMP. Farnesylation is required for full activity.