Receptor for prostaglandin E2 (PGE2). The activity of this receptor is mediated by G(s) proteins that stimulate adenylate cyclase. Has a relaxing effect on smooth muscle. May play an important role in regulating renal hemodynamics, intestinal epithelial transport, adrenal aldosterone secretion, and uterine function. Interacts with FEM1A. Phosphorylation mediates agonist-mediated desensitization by promoting cytoplasmic retention. Belongs to the G-protein coupled receptor 1 family. Was originally designated as the EP2 subtype.