Enables Notch binding activity. Acts upstream of or within Notch receptor processing; glial cell differentiation; and skeletal muscle fiber development. Located in dendrite and neuronal cell body. Is expressed in several structures, including alimentary system; central nervous system; limb; peripheral nervous system ganglion; and sensory organ. Orthologous to human DNER (delta/notch like EGF repeat containing). [provided by Alliance of Genome Resources, Apr 2022]