CRY2 and FBXL3 Cooperatively Degrade c-MYC.
CRY2 and FBXL3 Cooperatively Degrade c-MYC.
复制标题
FBXL 2和FBXL 3协同降解c-MYC。
DOI:
10.1016/j.molcel.2016.10.012
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发表时间:
2016-11-17
期刊:
影响因子:
16
通讯作者:
Lamia, Katja A.
中科院分区:
文献类型:
--
作者:
Huber, Anne-Laure;Papp, Stephanie J.;Chan, Alanna B.;Henriksson, Emma;Jordan, Sabine D.;Kriebs, Anna;Nguyen, Madelena;Wallace, Martina;Li, Zhizhong;Metallo, Christian M.;Lamia, Katja A.
For many years, a connection between circadian clocks and cancer has been postulated. Here, we describe an unexpected function for the circadian repressor CRY2 as a component of an FBXL3-containing E3 ligase that recruits T58-phosphorylated c-MYC for ubiquitylation. c-MYC is a critical regulator of cell proliferation; T58 is central in a phosphodegron long recognized as a hotspot for mutation in cancer. This site is also targeted by FBXW7, though the full machinery responsible for its turnover has remained obscure. CRY1 cannot substitute for CRY2 in promoting c-MYC degradation; their unique functions may explain prior conflicting reports that have fueled uncertainty about the relationship between clocks and cancer. Thus, we demonstrate that c-MYC is a target of CRY2-dependent protein turnover, suggesting a molecular mechanism for circadian control of cell growth and a new paradigm for circadian protein degradation. Circadian disruption increases the risk of many types of cancer. Huber et al. demonstrate that the circadian clock protein CRY2 recruits T58-phosphorylated c-MYC to SCFFBXL3, thus promoting its ubiquitination and degradation. This unexpected function of CRY2 may contribute to circadian protection from tumorigenesis.
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DOI:
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发表时间:
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影响因子:
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影响因子:
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