Enables mitogen-activated protein kinase binding activity and platelet activating factor receptor activity. Involved in several processes, including positive regulation of gene expression; positive regulation of transport; and regulation of cellular extravasation. Located in plasma membrane. Used to study several diseases, including acute kidney failure; neutropenia; perinatal necrotizing enterocolitis; pleurisy; and transient cerebral ischemia. Biomarker of conjunctivitis; sciatic neuropathy; and transient cerebral ischemia. Orthologous to human PTAFR (platelet activating factor receptor). [provided by Alliance of Genome Resources, Apr 2022]