USP7 deubiquitinates MDM2

Stable Identifier
Reaction [transition]
Homo sapiens
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In the presence of DAXX, USP7 deubiquitinates MDM2. DAXX expression therefore prolongs MDM2 half-life and inhibits TP53 activation (Tang et al. 2006). In the absence of DAXX or when DNA damage response is activated (Tang et al. 2006), USP7 associates with ubiquitinated TP53 rather than ubiquitinated MDM2 (Li et al. 2004, Sheng et al. 2006, Hu et al. 2006). USP7 also deubiquitinates MDM4 (MDMX) (Meulmeester et al. 2005, Sarkari et al. 2010). The role of DAXX in deubiquitination of MDM4 has not been examined.

Literature References
PubMed ID Title Journal Year
16402859 Structural basis of competitive recognition of p53 and MDM2 by HAUSP/USP7: implications for the regulation of the p53-MDM2 pathway

Gu, L, Shi, Y, Gu, W, Jeffrey, PD, Hu, M, Li, M

PLoS Biol. 2006
16474402 Molecular recognition of p53 and MDM2 by USP7/HAUSP

Arrowsmith, CH, Duan, S, Sheng, Y, Sarkari, F, Frappier, L, Wu, T, Saridakis, V

Nat. Struct. Mol. Biol. 2006
15053880 A dynamic role of HAUSP in the p53-Mdm2 pathway

Gu, W, Brooks, CL, Kon, N, Li, M

Mol. Cell 2004
16845383 Critical role for Daxx in regulating Mdm2

Wang, W, Zhang, J, Degenhardt, YY, Tang, J, Qu, LK, Michaelson, JS, Yang, X, El-Deiry, WS

Nat. Cell Biol. 2006
15916963 Loss of HAUSP-mediated deubiquitination contributes to DNA damage-induced destabilization of Hdmx and Hdm2

Maurice, MM, Dirks, RW, Jochemsen, AG, Abraham, TE, Ovaa, H, Meulmeester, E, Teunisse, AF, Boutell, C

Mol. Cell 2005
20713061 Further insight into substrate recognition by USP7: structural and biochemical analysis of the HdmX and Hdm2 interactions with USP7

Arrowsmith, CH, Sheng, Y, Sarkari, F, La Delfa, A, Frappier, L, Saridakis, V

J. Mol. Biol. 2010
Catalyst Activity

cysteine-type deubiquitinase activity of DAXX:(PolyUb,p-S166,S188-MDM2):USP7 [nucleoplasm]

Orthologous Events
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