PKD1: Involved in renal tubulogenesis. Involved in fluid-flow mechanosensation by the primary cilium in renal epithelium. Acts as a regulator of cilium length, together with PKD2. The dynamic control of cilium length is essential in the regulation of mechanotransductive signaling. The cilium length response creates a negative feedback loop whereby fluid shear-mediated deflection of the primary cilium, which decreases intracellular cAMP, leads to cilium shortening and thus decreases flow-induced signaling. May be an ion- channel regulator. Involved in adhesive protein-protein and protein-carbohydrate interactions. Defects in PKD1 are the cause of polycystic kidney disease autosomal dominant type 1 (ADPKD1). ADPKD is characterized by progressive formation and enlargement of cysts in both kidneys, typically leading to end-stage renal disease in adult life. Cysts also occurs in the liver and other organs. Its prevalence is estimated at about 1/1000. Belongs to the polycystin family. 3 isoforms of the human protein are produced by alternative splicing.
Protein type: Membrane protein, integral; Membrane protein, multi-pass; Cell adhesion
Chromosomal Location of Human Ortholog: 16p13.3
Cellular Component: Golgi membrane; basolateral plasma membrane; integral to plasma membrane; cytoplasm; motile primary cilium; plasma membrane; integral to membrane; nucleus; lateral plasma membrane; cilium
Molecular Function: protein domain specific binding; protein binding; calcium channel activity; carbohydrate binding; protein kinase binding
Biological Process: skin development; neural tube development; embryonic placenta development; positive regulation of protein binding; cell-matrix adhesion; heart development; G1/S-specific positive regulation of cyclin-dependent protein kinase activity; cell-cell adhesion; nitrogen compound metabolic process; elevation of cytosolic calcium ion concentration; protein export from nucleus; cell cycle arrest; kidney development; cartilage condensation; cytoplasmic sequestering of transcription factor; anatomical structure morphogenesis; in utero embryonic development; organelle organization and biogenesis; detection of mechanical stimulus; JAK-STAT cascade; liver development; genitalia development; peptidyl-serine phosphorylation; gut development; branching morphogenesis of a tube; spinal cord development; cartilage development; calcium-independent cell-matrix adhesion; positive regulation of transcription from RNA polymerase II promoter; homophilic cell adhesion
Disease: Polycystic Kidney Disease 1
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