Enables signaling receptor binding activity. Involved in protein localization to plasma membrane and response to osmotic stress. Acts upstream of or within several processes, including gamete generation; male gonad development; and response to retinoic acid. Located in plasma membrane. Is expressed in several structures, including alimentary system; endocrine gland; ganglia; genitourinary system; and skin. Orthologous to human MAP7 (microtubule associated protein 7). [provided by Alliance of Genome Resources, Apr 2022]