Receptor for prokineticin 1. Exclusively coupled to the G(q) subclass of heteromeric G proteins. Activation leads to mobilization of calcium, stimulation of phosphoinositide turnover and activation of p44/p42 mitogen-activated protein kinase. May play a role during early pregnancy (By similarity). Widely expressed in peripheral tissues with the highest level in the spleen and moderate levels in the adipose tissues, thymus, lung, kidney, testis, uterus and small intestine. Belongs to the G-protein coupled receptor 1 family.