The role of insulin receptor substrate-1 in the oncogenicity of simian virus 40 T antigen

Abstract

The Simian Virus 40 large T antigen (Tag) and the insulin receptor substrate-1 (IRS-1) interact with each other. Tag is a nuclear protein even in the absence of IRS-1, but IRS-1 is required for occupancy and activation by Tag of the ribosomal DNA (rDNA), cyclin D1 and c-myc promoters. Our results indicate that IRS-1 plays a significant role in Tag activation of cell cycle progression genes. ©2008 Landes Bioscience.