Enables ABC-type sterol transporter activity. Involved in cholesterol efflux and cholesterol homeostasis. Acts upstream of or within cellular response to leukemia inhibitory factor. Located in endosome membrane. Is expressed in several structures, including alimentary system; immune system; liver; nervous system; and sensory organ. Orthologous to human ABCG4 (ATP binding cassette subfamily G member 4). [provided by Alliance of Genome Resources, Apr 2022]