A novel site of AKT-mediated phosphorylation in the human MDM2 onco-protein

Diane Milne, Petros Kampanis, Samantha Nicol, Sylvia Dias, David G. Campbell, Frances Fuller-Pace, David Meek

    Research output: Contribution to journalArticle

    34 Citations (Scopus)

    Abstract

    MDM2 is an E3 ubiquitin ligase which mediates ubiquitylation and proteasome-dependent degradation of the p53 tumor suppressor protein. Phosphorylation of MDM2 by the protein kinase AKT is thought to regulate MDM2 function in response to survival signals, but there has been uncertainty concerning the identity of the sites phosphorylated by AKT. In the present study, we identify Ser-166, a site previously reported as an AKT target, and Ser-188, a novel site which is the major site of phosphorylation of MDM2 by AKT in vitro. Analysis of MDM2 in cultured cells confirms that Ser-166 and Ser-188 are phosphorylated by AKT in a physiological context.
    Original languageEnglish
    Pages (from-to)270-276
    Number of pages7
    JournalFEBS Letters
    Volume577
    Issue number1-2
    DOIs
    Publication statusPublished - 5 Nov 2004

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