Polycystic kidney disease 1/polycystin-1 (PKD1/PC1) plays a regulatory role in cell migration and cell proliferation through mammalian targets of rapamycin (mTOR) and Janus kinase (JAK) signals. PKD1 inhibits cell migration and in some situations, acts as a tumor suppressor protein in the lung cancer cell line (A549). Before birth, polycystin-1 is the most active protein in kidney cells, and it interacts and works with polycystin-2 (PKD2). Mutations in the PKD1 gene are responsible for 85 percent of polycystic kidney diseases (PKDs).
