We have cloned a receptor, named LSCPR, for vasopressin-related Lys-conopressin in Lymnaea stagnalis. Lys-conopressin evokes Ca2+-dependent Cl- currents in Xenopus oocytes injected with LSCPR cRNA. Expression of LSCPR mRNA was detected in central neurons and peripheral muscles associated with reproduction. Upon application of Lys-conopressin, both neurons and muscle cells depolarize owing to an enhancement of voltage-dependent Ca2+ currents and start firing action potentials. Some neurons coexpress LSCPR and Lys-conopressin, suggesting an autotransmitter-like function for this peptide. Lysconopressin also induces a depolarizing response in LSCPR-expressing neuroendocrine cells that control carbohydrate metabolism. Thus, in addition to oxytocin-like reproductive functions, LSCPR mediates vasopressin-like metabolic functions of Lys-conopressin as well. © 1995.
van Kesteren, R. E., Tensen, C. P., Smit, A. B., van Minnen, J., van Soest, P. F., Kits, K. S., … Geraerts, W. P. M. (1995). A novel G protein-coupled receptor mediating both vasopressin- and oxytocin-like functions of Lys-conopressin in Lymnaea stagnalis. Neuron, 15(4), 897–908. https://doi.org/10.1016/0896-6273(95)90180-9