Predicted to enable several functions, including chemokine receptor activity; cytoskeletal protein binding activity; and ubiquitin protein ligase binding activity. Involved in myelin maintenance; positive regulation of cold-induced thermogenesis; and positive regulation of oligodendrocyte differentiation. Acts upstream of or within several processes, including circulatory system development; gamete generation; and nervous system development. Located in cell-cell junction; external side of plasma membrane; and growth cone. Is expressed in several structures, including alimentary system; cardiovascular system; embryo mesenchyme; extraembryonic component; and nervous system. Used to study WHIM syndrome. Human ortholog(s) of this gene implicated in WHIM syndrome; hematologic cancer (multiple); leukopenia; osteoporosis; and pancreatic adenocarcinoma. Orthologous to human CXCR4 (C-X-C motif chemokine receptor 4). [provided by Alliance of Genome Resources, Apr 2022]