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SV40 large tumor antigen forms a specific complex with the product of the retinoblastoma susceptibility gene.

Decaprio J.A., Ludlow J.W., Figge J., Shew J.-Y., Huang C.-M., Lee W.-H., Marsilio E., Paucha E., Livingston D.M.

Monkey cells synthesizing SV40 large T antigen were lysed and the extracts immunoprecipitated with either monoclonal anti-T antibody or monoclonal antibody to p110-114, the product of the retinoblastoma susceptibility gene (Rb). T and p110-114 coprecipitated in each case, implying that the proteins are complexed with each other. Substitution and internal deletion mutants of T that contain structural alterations in a ten residue, transformation-controlling domain failed to complex with p110-114. In contrast, T mutants bearing structural changes outside of this domain bound to p110-114. These results are consistent with a model for transformation by SV40 which, at least in part, involves T/p110-114 complex formation and the perturbation of Rb protein and/or T function.

Cell 54:275-283(1988) [PubMed] [Europe PMC]

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