Apis mellifera octopamine receptor beta-2 (AmOctβ2R)

The Apis mellifera octopamine receptor beta-2 (AmOctβ2R) is a G protein-coupled receptor (GPCR) that plays a pivotal role in the honey bee nervous system by mediating the physiological effects of octopamine, a key biogenic amine in invertebrates. This receptor is primarily coupled to the Gs signaling pathway, where its activation leads to the stimulation of adenylyl cyclase and a subsequent increase in intracellular cyclic AMP (cAMP) levels (Balfanz et al., 2005, PubMed: 15507493). AmOctβ2R is highly expressed in brain regions associated with high-order processing, such as the mushroom bodies, and is essential for modulating behaviors including olfactory learning, memory consolidation, and foraging activity (Grohmann et al., 2003, PubMed: 12730338). In the field of apiculture, this receptor is a significant pharmacological target for acaricides like amitraz, which, through its active metabolite, acts as an agonist to disrupt the nervous systems of parasitic mites while also affecting bee physiology. Research into AmOctβ2R is critical for understanding the molecular basis of social insect behavior and for assessing the impact of environmental stressors and pesticides on honey bee health. Its distinct pharmacological profile compared to vertebrate adrenergic receptors makes it an important subject for comparative neurobiology and selective drug design.

Other names

AmOctβ2ROctopamine receptor beta-2RBeta-2-adrenergic-like octopamine receptorOctβ2RAmOctB2R

The receptor acts as a Gs-coupled protein; agonist binding (such as octopamine or the amitraz metabolite DPMF) stimulates adenylyl cyclase activity, leading to an increase in intracellular cAMP levels which modulates neuronal excitability and behavior (UniProt: Q5U912).