Plays a role in formation of the lens suture in the eye, which is important for normal optical properties of the lens. May form dimers. Belongs to the glycosyl hydrolase 1 family. Klotho subfamily. Although it belongs to the glycosyl hydrolase 1 family, Asp-201 is present instead of the conserved Glu which is an active site residue. It is therefore expected that this protein lacks glycosidase activity.