Enables microtubule plus-end binding activity. Involved in microtubule bundle formation and microtubule polymerization. Acts upstream of or within non-motile cilium assembly; positive regulation of microtubule plus-end binding activity; and protein localization to microtubule cytoskeleton. Located in Golgi apparatus; cell projection membrane; and microtubule cytoskeleton. Is expressed in several structures, including alimentary system; brain; genitourinary system; hemolymphoid system gland; and liver and biliary system. Orthologous to human MAPRE1 (microtubule associated protein RP/EB family member 1). [provided by Alliance of Genome Resources, Apr 2022]