Tubulin is the major constituent of microtubules, a cylinder consisting of laterally associated linear protofilaments composed of alpha- and beta-tubulin heterodimers. Microtubules grow by the addition of GTP-tubulin dimers to the microtubule end, where a stabilizing cap forms. Below the cap, tubulin dimers are in GDP-bound state, owing to GTPase activity of alpha-tubulin. Required for the normal dynamic behavior of the non-centrosomal microtubules in the epidermal syncytium. Involved in the redistribution of microtubule end-binding protein EB1/ebp-2 caused by wounding. Required to modulate expression in the epidermis of antimicrobial peptides, such as nlp-29, after wounding, or fungal infection