Involved in several processes, including cilium assembly; determination of left/right symmetry; and maintenance of animal organ identity. Acts upstream of or within several processes, including extracellular matrix organization; non-motile cilium assembly; and positive regulation of protein binding activity. Located in ciliary base and ciliary inversin compartment. Is expressed in embryo. Used to study autosomal dominant polycystic kidney disease and nephronophthisis 3. Human ortholog(s) of this gene implicated in Meckel syndrome 7; nephronophthisis; nephronophthisis 3; and renal-hepatic-pancreatic dysplasia. Orthologous to human NPHP3 (nephrocystin 3). [provided by Alliance of Genome Resources, Apr 2022]