nphp-4 encodes an ortholog of human NPHP4 (OMIM:607215, mutated injuvenile nephronophthisis and Senior-Loken syndrome-4) that is requiredfor normal chemotaxis, lifespan, and male mating behavior; NPHP-4 isexpressed in diverse neurons (amphid and phasmid sensory, URX, labial,male lumbar and cloacal ganglia, and male-specific CEM, HOB and RnB);within neurons, NPHP-4 is a ciliary protein, localized to the transistionzone at cilial bases rather than ciliary axonemes, and absent fromsomata, axons, or dendrites; NPHP-4 colocalizes with NPHP-1 and PKD-2 inmale-specific sensory cilia, and is required for the normal ciliarylocalization of NPHP-1; NPHP-4 expression requires DAF-19, and mutating anX-box in nphp-4's promoter abolishes nphp-4 expression; NPHP-4 is requiredfor NPHP-1's localization to transistion zones; morphologically, nphp-4mutant cilia are normal, indicating a function for NPHP-4 in signaltransduction.
Involved in several processes, including determination of adult lifespan; male mating behavior; and plasma membrane bounded cell projection organization. Located in ciliary basal body; ciliary transition zone; and non-motile cilium. Expressed in cloacal ganglion; neurons; and tail ganglion. Used to study Meckel syndrome and nephronophthisis. Human ortholog(s) of this gene implicated in several diseases, including Joubert syndrome 4; Senior-Loken syndrome; and nephronophthisis 4. Is an ortholog of human NPHP4 (nephrocystin 4).
Map position created from combination of previous interpolated map position (based on known location of sequence) and allele information. Therefore this is not a genetic map position based on recombination frequencies or genetic experiments. This was done on advice of the CGC.