Involved in heart development. Predicted to be located in lysosomal membrane. Predicted to be part of protein-containing complex. Predicted to be active in plasma membrane. Human ortholog(s) of this gene implicated in COVID-19; adenosquamous gallbladder carcinoma; and gallbladder adenocarcinoma. Orthologous to human IFITM1 (interferon induced transmembrane protein 1); IFITM2 (interferon induced transmembrane protein 2); and IFITM3 (interferon induced transmembrane protein 3). [provided by Alliance of Genome Resources, Apr 2022]