Microtubule-associated protein with the capacity to bundle and stabilize microtubules. May associate with chromosomes and promote the organization of mitotic spindle microtubules around them (By similarity). Interacts with DNA and microtubules. Associates with mitotic spindle microtubules, particularly in the vicinity of chromosomes. Expressed in the blastoderm margin. Expression shifts to the spinal cord and endodermal tissue at the somitogenesis stage. Belongs to the NUSAP family.