CST, 6451S, SignalSilence® Rb siRNA I

siRNA for studying Rb in the research area. Product Usage Information CST recommends transfection with 50-100 nM SignalSilence ® Rb siRNA I 48 hours prior to cell lysis. For transfection procedure, follow protocol provided by the transfection reagent manufacturer. Please feel free to contact CST with any questions on use. Storage SignalSilence ® siRNA is supplied in RNAse-free water. Aliquot and store at -20ºC. Background The retinoblastoma tumor suppressor protein Rb regulates cell proliferation by controlling progression through the restriction point within the G1-phase of the cell cycle (1). Rb has three functionally distinct binding domains and interacts with critical regulatory proteins including the E2F family of transcription factors, c-Abl tyrosine kinase, and proteins with a conserved LXCXE motif (2-4). Cell cycle-dependent phosphorylation by a CDK inhibits Rb target binding and allows cell cycle progression (5). Rb inactivation and subsequent cell cycle progression likely requires an initial phosphorylation by cyclin D-CDK4/6 followed by cyclin E-CDK2 phosphorylation (6). Specificity of different CDK/cyclin complexes has been observed (6-8) and cyclin D1 is required for Ser780 phosphorylation (9). RNA interference has been used to silence Rb protein expression in prostate cancer cells resulting in increased Bcl-2 protein levels (10). Alternate Names P105-RB; PP105; PP110; RB-1; RB1; Retinoblastoma-associated protein Specification REACTIVITY: H