Enables ankyrin binding activity. Involved in several processes, including cell development; establishment of mitotic spindle orientation; and regulation of cell morphogenesis. Located in several cellular components, including axolemma; lateral plasma membrane; and somatodendritic compartment. Expressed in several structures, including gonad; neurons; pharynx; somatic nervous system; and vulval cell. Used to study MASA syndrome. Human ortholog(s) of this gene implicated in schizophrenia. Is an ortholog of human NFASC (neurofascin) and NRCAM (neuronal cell adhesion molecule).