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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The candidate tumour suppressor p33ING1 cooperates with p53 in cell growth control.

The candidate tumour-suppressor gene ING1 has been identified by using the genetic suppressor element (GSE) methodology. ING1 encodes a nuclear protein, p33ING1, overexpression of which inhibits growth of different cell lines. The properties of p33ING1 suggest its involvement in the negative regulation of cell proliferation and in the control of cellular ageing, anchorage dependence and apoptosis. These cellular functions depend largely on the activity of p53, a tumour-suppressor gene that determines the cellular response to various types of stress. Here we report that the biological effects of ING1 and p53 are interrelated and require the activity of both genes: neither of the two genes can, on its own, cause growth inhibition when the other one is suppressed. Furthermore, activation of transcription from the p21/WAF1 promoter, a key mechanism of p53-mediated growth control, depends on the expression of ING1. A physical association between p33ING1 and p53 proteins has been detected by immunoprecipitation. These results indicate that p33ING1 is a component of the p53 signalling pathway that cooperates with p53 in the negative regulation of cell proliferation by modulating p53-dependent transcriptional activation.[1]


  1. The candidate tumour suppressor p33ING1 cooperates with p53 in cell growth control. Garkavtsev, I., Grigorian, I.A., Ossovskaya, V.S., Chernov, M.V., Chumakov, P.M., Gudkov, A.V. Nature (1998) [Pubmed]
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