title: The ARF tumour suppressor.
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.
authors.affiliation: Westmead Institute for Cancer Research, University of Sydney at Westmead Millennium Institute, Westmead Hospital, Westmead, NSW 2145, Australia.
authors.forename: Stuart J
authors.initials: SJ
authors.lastname: Gallagher
authors.forename: Richard F
authors.initials: RF
authors.lastname: Kefford
authors.forename: Helen
authors.initials: H
authors.lastname: Rizos
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D011487:Protein Conformation; D025803:Tumor Suppressor Protein p14ARF / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism
chemical_list: D025803:Tumor Suppressor Protein p14ARF; D016159:Tumor Suppressor Protein p53