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). Expressed at high levels in the heart, skeletal muscle and pancreas. Expressed at lower levels in the brain, lung, liver and kidney. Belongs to the G-protein coupled receptor 1 family.