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Letter

Nature Cell Biology 8, 855–862 (1 August 2006) | doi:10.1038/ncb1442

Critical role for Daxx in regulating Mdm2

Jun Tang , Li-Ke Qu , Jianke Zhang , Wenge Wang , Jennifer S. Michaelson , Yan Y. Degenhardt , Wafik S. El-Deiry & Xiaolu Yang

The tumour suppressor p53 induces apoptosis or cell-cycle arrest in response to genotoxic and other stresses. In unstressed cells, the anti-proliferative effects of p53 are restrained by mouse double minute 2 (Mdm2), a ubiquitin ligase (E3) that promotes p53 ubiquitination and degradation.