Predicted to enable SH3 domain binding activity; protein kinase binding activity; and small GTPase binding activity. Involved in several processes, including lung development; negative regulation of epidermal growth factor-activated receptor activity; and skin morphogenesis. Located in cytoplasm. Is extrinsic component of cytoplasmic side of plasma membrane. Is expressed in alveolar system; lung; and lung epithelium. Used to study endometrial cancer and osteoarthritis. Orthologous to human ERRFI1 (ERBB receptor feedback inhibitor 1). [provided by Alliance of Genome Resources, Apr 2022]