Studies on the Expression and Phosphorylation of the USP4 Deubiquitinating Enzyme

Studies on the Expression and Phosphorylation of the USP4 Deubiquitinating Enzyme

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dc.contributor.author Bastarache, Sophie
dc.date.accessioned 2011-08-26T20:20:15Z
dc.date.available 2011-08-26T20:20:15Z
dc.date.created 2011 en_US
dc.date.issued 2011-08-26
dc.identifier.uri http://hdl.handle.net/10393/20184
dc.description.abstract The USP4 is a deubiquitinating enzyme found elevated in certain human lung and adrenal tumours. USP4 has a very close relative, USP15, which has caused great difficulty in studying only one or the other. We have had generated two antibodies specific to USP4 and USP15, and have confirmed that the two do not cross react. Although there have been previous findings of interacting partners, possible substrates and pathways in which it is involved, the biological role of USP4 is mostly unknown. We have used these antibodies to determine that USP4 and USP15 expression differs across tissue and cell types, and that expression changes as the organism ages. We have shown that USP4 plays a role in canonical Wnt signaling, perhaps by stabilizing Beta-catenin, and identified GRK2 as a kinase, phosphorylating USP4. These data have provided enough information to form a hypothesis, implicating USP4 with the destruction complex in the Wnt signaling pathway. en_US
dc.language.iso en en_US
dc.subject USP4 en_US
dc.subject Ubiquitin en_US
dc.subject Proteasome en_US
dc.subject B-catenin en_US
dc.subject Wnt signaling en_US
dc.subject GRK2 en_US
dc.title Studies on the Expression and Phosphorylation of the USP4 Deubiquitinating Enzyme en_US
dc.type Thèse / Thesis en_US
dc.faculty.department Biochimie, microbiologie et immunologie / Biochemistry, Microbiology and Immunology en_US
dc.contributor.supervisor Gray, Douglas
dc.embargo.terms immediate en_US
dc.degree.name MSc en_US
dc.degree.level masters en_US
dc.degree.discipline Médecine / Medicine en_US

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