Varroa destructor octopamine receptor beta-2 (Octβ2R)

The Varroa destructor octopamine receptor beta-2 (Octβ2R) is a G protein-coupled receptor (GPCR) that serves as a vital component of the octopaminergic signaling system in the parasitic mite Varroa destructor [1]. Octopamine is the primary biogenic amine in invertebrates, functioning similarly to norepinephrine in vertebrates to modulate physiological processes such as locomotion, metabolism, and stress responses [2]. Octβ2R specifically mediates these effects by coupling to Gs proteins, which stimulates adenylyl cyclase and increases intracellular cAMP levels [3, 5]. This receptor is a major pharmacological target for acaricides, most notably amitraz and its active metabolite DPMF, which act as agonists to induce lethal overstimulation of the mite's nervous system [4]. Because Varroa destructor is a significant threat to honey bee (Apis mellifera) health, Octβ2R is a focus for developing selective treatments that exploit structural differences between mite and bee receptors to ensure host safety [5]. Research into this receptor also addresses the growing challenge of acaricide resistance, as specific mutations in the receptor gene can reduce drug binding affinity [4, 6]. Consequently, Octβ2R remains a central figure in both the study of mite neurobiology and the development of sustainable apicultural management practices [7]. [1] Blenau, W., et al. (2012). Pesticide Biochemistry and Physiology. [2] Farooqui, T. (2012). Vitamins and Hormones. [3] O'Neal, S. T., et al. (2017). Scientific Reports. [4] González-Cabrera, J., et al. (2016). PLOS ONE. [5] Wu, S. F., et al. (2021). Insect Molecular Biology. [6] Corley, J. P., et al. (2022). Journal of Economic Entomology. [7] UniProtKB - A0A0P0G6H1 (OCTB2_VARDE).

Other names

Octopamine receptor beta-2RVdOctβ2RBeta-2-adrenergic-like octopamine receptorVdOctβ2Octopamine receptor beta-2 (Varroa destructor)

Agonist-mediated activation of Gs-coupled signaling pathways, leading to increased intracellular cAMP levels and subsequent overstimulation of the nervous system, resulting in mite paralysis and death [3, 4].