Involved in ciliogenesis (PubMed:32453716). It is required for appropriate acetylation and polyglutamylation of ciliary microtubules, and regulation of cilium length (PubMed:32453716). Interacts with microtubules and promotes microtubule polymerization via its HEAT repeat domains, especially those in TOG region 2 and 4 (By similarity). {ECO:0000250|UniProtKB:Q17423, ECO:0000250|UniProtKB:Q6A070, ECO:0000269|PubMed:32453716}. This is the function of TOGARAM1 (TOG array regulator of axonemal microtubules 1, Ensembl gene identifier ENSG00000198718).