The function of ENSG00000163060 (TEKT4, tektin 4) is as follows. Microtubule inner protein (MIP) part of the dynein-decorated doublet microtubules (DMTs) in cilia and flagellar axoneme (PubMed:36191189). Forms filamentous polymers in the walls of ciliary and flagellar microtubules (By similarity). Contributes to normal sperm motility (By similarity). {ECO:0000250|UniProtKB:Q2TA38, ECO:0000250|UniProtKB:Q6X6Z7, ECO:0000269|PubMed:36191189}.