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The ARF Tumour Suppressor

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Publisher Elsevier
Date 2006 Apr 8
PMID 16600663
Citations 28
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Abstract

The ARF tumour suppressor is a product of the INK4a/ARF locus; a sequence that is frequently altered in human cancer. ARF is upregulated by oncogenic stimuli and is a critical regulator of p53 stability through interactions with the mdm2 and ARF-BP1/Mule ubiquitin ligases. Cellular stress signals liberate ARF from the nucleolus where it is bound to B23/nucleophosmin. This nucleolar location of ARF may serve as a reservoir for the rapid induction of p53, but may also serve to co-ordinate effects on cell cycle, survival and growth. The biological functions of ARF interactions with other binding partners remain uncertain, but ARF-mediated sumoylation may represent a unifying effector pathway.

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