Plays a role in the development of the nervous system such as in neurite outgrowth and elongation. Involved in motor axon growth and guidance. Required for correct interactions of motor axons with the horizontal myoseptum. Expressed in developing motor neurons. Expressed in primary motor neurons from early stages of their differentiation (12 hpf) to at least 24 hpf. Overexpression partially rescues the motor axon defects upon Smn-depleted.