Predicted to enable GTP binding activity. Predicted to be a structural constituent of cytoskeleton. Involved in meiotic spindle organization. Located in spindle microtubule. Expressed in several structures, including germ line; gonad; oocyte; tail; and touch receptor neurons. Human ortholog(s) of this gene implicated in complex cortical dysplasia with other brain malformations 1 and congenital fibrosis of the extraocular muscles 3A. Is an ortholog of several human genes including TUBB3 (tubulin beta 3 class III); TUBB6 (tubulin beta 6 class V); and TUBB8B (tubulin beta 8B).