Glycoprotein specific to acellular membranes of the inner ear. May be required for the anchoring of the otoconial membranes and cupulae to the underlying neuroepithelia in the vestibule. May be involved in the organization and/or stabilization of the fibrillar network that compose the tectorial membrane in the cochlea. May play a role in mechanotransduction processes (By similarity). Found in fiber-like structures during the maturation process of the tectorial membrane. N-glycosylated. Not O-glycosylated. The disease is caused by variants affecting the gene represented in this entry. Belongs to the otogelin family.