Predicted to enable WW domain binding activity. Predicted to be involved in several processes, including negative regulation of transport; positive regulation of I-kappaB kinase/NF-kappaB signaling; and positive regulation of protein ubiquitination. Predicted to act upstream of or within several processes, including negative regulation of interleukin-4 production; negative regulation of type 2 immune response; and regulation of lymphocyte activation. Predicted to be located in cell cortex. Predicted to be active in Golgi apparatus; endoplasmic reticulum; and perinuclear region of cytoplasm. Orthologous to human NDFIP1 (Nedd4 family interacting protein 1). [provided by Alliance of Genome Resources, Apr 2022]