The E3 Ubiquitin Ligase SCF(Cyclin F) Transmits AKT Signaling to the Cell-Cycle Machinery.
The E3 Ubiquitin Ligase SCF(Cyclin F) Transmits AKT Signaling to the Cell-Cycle Machinery.
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DOI:
10.1016/j.celrep.2017.08.099
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发表时间:
2017-09-26
期刊:
影响因子:
8.8
通讯作者:
Emanuele MJ
中科院分区:
文献类型:
--
作者:
Choudhury R;Bonacci T;Wang X;Truong A;Arceci A;Zhang Y;Mills CA;Kernan JL;Liu P;Emanuele MJ
The oncogenic AKT kinase is a key regulator of apoptosis, cell growth and cell cycle progression. Despite its important role in proliferation, it remains largely unknown how AKT is mechanistically linked to cell cycle. We show here that Cyclin F, a substrate receptor F-box protein for the SCF family of E3 ubiquitin ligases, is a bona fide AKT substrate. Cyclin F expression oscillates throughout the cell cycle, a rare feature among the 69 human F-box proteins, and all of its known substrates are involved in proliferation. AKT phosphorylation of Cyclin F enhances its stability and promotes assembly into productive E3 ligase complexes. Importantly, expression of mutant versions of Cyclin F that cannot be phosphorylated by AKT impair cell cycle entry. Our data suggest that Cyclin F transmits mitogen signaling through AKT to the core cell cycle machinery. This discovery has potential implications for proliferative control in malignancies where AKT is activated. Choudhury et al. report that Cyclin F, an E3 ubiquitin ligase substrate receptor F-box protein, is phosphorylated by the oncogenic kinase AKT. Intriguingly, phosphorylation enhances Cyclin F stability and promotes cell cycle entry. These data suggest that Cyclin F bridges growth factor to the core cell cycle machinery.
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