Acts upstream of or within cerebrospinal fluid circulation. Located in extracellular region. Is expressed in central nervous system; retina inner nuclear layer; and retina outer nuclear layer. Used to study Joubert syndrome 26. Human ortholog(s) of this gene implicated in Joubert syndrome 26. Orthologous to human KATNIP (katanin interacting protein). [provided by Alliance of Genome Resources, Apr 2022]