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2018 ; 18
(2
): 69-88
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Ubiquitin ligases in oncogenic transformation and cancer therapy
#MMPMID29242641
Senft D
; Qi J
; Ronai ZA
Nat Rev Cancer
2018[Feb]; 18
(2
): 69-88
PMID29242641
show ga
The cellular response to external stress signals and DNA damage depends on the
activity of ubiquitin ligases (E3s), which regulate numerous cellular processes,
including homeostasis, metabolism and cell cycle progression. E3s recognize,
interact with and ubiquitylate protein substrates in a temporally and spatially
regulated manner. The topology of the ubiquitin chains dictates the fate of the
substrates, marking them for recognition and degradation by the proteasome or
altering their subcellular localization or assembly into functional complexes.
Both genetic and epigenetic alterations account for the deregulation of E3s in
cancer. Consequently, the stability and/or activity of E3 substrates are also
altered, in some cases leading to downregulation of tumour-suppressor activities
and upregulation of oncogenic activities. A better understanding of the
mechanisms underlying E3 regulation and function in tumorigenesis is expected to
identify novel prognostic markers and to enable the development of the next
generation of anticancer therapies. This Review summarizes the oncogenic and
tumour-suppressor roles of selected E3s and highlights novel opportunities for
therapeutic intervention.