Human MDM4 (MDMX) is phosphorylated on serine residue S403 by ATM. This site is important for MDM2-mediated ubiquitination of MDM4 after induction of double strand DNA breaks (Pereg et al. 2005, Chen et al. 2005).
Lane, WS, Chen, L, Pan, Y, Chen, J, Gilkes, DM
Shiloh, Y, Meulmeester, E, Jochemsen, AG, Pereg, Y, Teunisse, AF, Shkedy, D, de Graaf, P, Biton, S, Lehmann, WD, Edelson-Averbukh, M, Salek, M
protein serine/threonine kinase activity of p-S1981,Ac-K3016-ATM [nucleoplasm]
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