The cullins are a family of proteins that are integral to cell cycle regulation. Members of this family include human Cul proteins, C.elegans Ce-Cul-1, and S. cerevisiae Cdc53. Proper control of cell cycle progression is essential for the prevention of tumorigenesis. Mutant forms of both Ce-Cul-1 and Cdc53 have been implicated in the oncogenic process. The human Cul family of proteins, Cul-1, -2, -3, -4A, -4B, and -5, have also been implicated in oncogenic processes. Abnormal nuclear localization of Cul-2 is seen in a rare hereditary condition known as VHL (von Hippel-Lindau) syndrome. Patients with VHL syndrome possess a mutant VHL gene and develop cancers such as retinal anginomas, CNS hemangioblastomas, and renal cell carcinomas. Cul-3 is widely expressed in normal cells and tissues, and shows increased expression in colon cancer cells. Cul-3 can associate with cyclin E in mammalian cells, and overexpression of Cul-3 targets cyclin E for ubiquination, while deletion of Cul-3 in mice leads to increased cyclin E accumulation and abnormal regulation of S-phase. Thus, the Cul family of proteins may have roles in cell cycle regulation and tumoriogenesis.
This antibody is routinely tested by western blot analysis. Other applications were tested at BD Biosciences Pharmingen during antibody development only or reported in the literature.