Microtubule-associated protein that stabilize microtubules (MT). Involved in the regulation of MT organization and dynamics. Confers MT resistance to the drug propyzamide and cold conditions. Forms a dimer (By similarity). Binds to microtubules (MT). Bundles polymerized MT via the formation of 25-nm crossbridges with centrally located endocytic MT. During interphase, binds cortical microtubules. In M-phase, locates to the preprophase band. Decorates entire mitotic spindle during cell division. During the anaphase to telophase transition, accumulates in the midline where oppositely oriented phragmoplast MTs overlap. In the phragmoplast, colocalizes completely with the MTs. Belongs to the MAP65/ASE1 family.