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Regulation of HDM2 activity by the ribosomal protein L11

  1. Author:
    Lohrum, M. A. E.
    Ludwig, R. L.
    Kubbutat, M. H. G.
    Hanlon, M.
    Vousden, K. H.

  2. Author Address

    NCI, Frederick Canc Res & Dev Ctr, Regulat Cell Growth Lab, Frederick, MD 21702 USA NCI, Frederick Canc Res & Dev Ctr, Regulat Cell Growth Lab, Frederick, MD 21702 USA Vousden KH NCI, Frederick Canc Res & Dev Ctr, Regulat Cell Growth Lab, Frederick, MD 21702 USA
    1. Year: 2003
  2. Journal: Cancer Cell
    1. 3
    2. 6
    3. Pages: 577-587
  4. Type of Article: Article
  1. Abstract:

    The HDM2 protein plays an important role in regulating the stability and function of the p53 tumor suppressor protein. In this report, we show that the ribosomal protein L11 can interact with HDM2 and inhibit HDM2 function, thus leading to the stabilization and activation of p53. The inhibition of HDM2 activity by L11 shows some similarity to the previously described activity of ARF, and expression of either ARF or H 1 can induce a p53 response. Enhancement of the interaction between endogenous L11 and HDM2 following treatment of cells with low levels of actinomycin-D suggests that the HDM2/L11 interaction represents a novel pathway for p53 stabilization in response to perturbations in ribosome biogenesis.

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