MGI:104672Homozygotes have kidney cysts and show neonatal or postnatal lethality, depending on strain background. On a congenic 129P2 background, mice have tremors, polydactyly, defective tubular secretory function and ion homeostasis, hypocalcemia, hyperphosphatemia, hyperuremia, and terminal renal failure. Heterozygosity for KO or specific intronic (splice) mutations affects sleep patterns.