Dopamine receptors

Dopamine receptors are a family of five G protein-coupled receptor (GPCR) subtypes (D1, D2, D3, D4, D5) divided into two families: D1-like (D1 and D5) and D2-like (D2, D3, and D4). D1-like receptors primarily couple to Gs/Golf proteins, increasing cAMP, while D2-like receptors primarily couple to Gi/Go proteins, decreasing cAMP. They are widely distributed in the brain and periphery and play crucial roles in motor control, cognition, reward, learning, and renal and metabolic functions. Dysregulation is implicated in neurological and psychiatric disorders such as Parkinson's Disease, Schizophrenia, and ADHD. Dopamine receptors are therapeutic targets, although challenges exist in developing ligands with favorable pharmacokinetics, reduced off-target effects, and subtype specificity.

Other names

Dopamine D1-D5 receptorsDopamine receptor family

Dopamine receptors are GPCRs that bind dopamine. D1-like receptors (D1, D5) are primarily coupled to Gs/Golf proteins, activating adenylyl cyclase to increase cAMP. They also stimulate phospholipase C and increase intracellular calcium. D2-like receptors (D2, D3, D4) are primarily coupled to Gi/Go proteins, inhibiting adenylyl cyclase to decrease cAMP. They also activate potassium channels. Therapeutic ligands modulate receptor activity (agonists, antagonists, PAMs) affecting these downstream signaling pathways.