Somatic gain-of-function mutations in BUD13 promote oncogenesis by disrupting Fbw7 function.
Somatic gain-of-function mutations in BUD13 promote oncogenesis by disrupting Fbw7 function.
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DOI:
10.1084/jem.20222056
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发表时间:
2023-10-02
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影响因子:
--
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Chen et al. develop an algorithm to map enzyme-substrate-recognizing motif mutations in cancer and find BUD13 AGC kinase motif mutations fuel colon cancer growth by inactivating the tumor suppressive E3 ligase Fbw7 via novel mechanisms. Somatic mutations occurring on key enzymes are extensively studied and targeted therapies are developed with clinical promises. However, context-dependent enzyme function through distinct substrates complicated targeting a given enzyme. Here, we develop an algorithm to elucidate a new class of somatic mutations occurring on enzyme-recognizing motifs that cancer may hijack to facilitate tumorigenesis. We validate BUD13-R156C and -R230Q mutations evading RSK3-mediated phosphorylation with enhanced oncogenicity in promoting colon cancer growth. Further mechanistic studies reveal BUD13 as an endogenous Fbw7 inhibitor that stabilizes Fbw7 oncogenic substrates, while cancerous BUD13-R156C or -R230Q interferes with Fbw7Cul1 complex formation. We also find this BUD13 regulation plays a critical role in responding to mTOR inhibition, which can be used to guide therapy selections. We hope our studies reveal the landscape of enzyme-recognizing motif mutations with a publicly available resource and provide novel insights for somatic mutations cancer hijacks to promote tumorigenesis with the potential for patient stratification and cancer treatment.
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影响因子:
64.8
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Inuzuka, Hiroyuki;Shaik, Shavali;Onoyama, Ichiro;Gao, Daming;Tseng, Alan;Maser, Richard S.;Zhai, Bo;Wan, Lixin;Gutierrez, Alejandro;Lau, Alan W.;Xiao, Yonghong;Christie, Amanda L.;Aster, Jon;Settleman, Jeffrey;Gygi, Steven P.;Kung, Andrew L.;Look, Thomas;Nakayama, Keiichi I.;DePinho, Ronald A.;Wei, Wenyi
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通讯作者:
Baltimore, David
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Hao, Bing;Oehlmann, Stephanie;Pavletich, Nikola P.
通讯作者:
Pavletich, Nikola P.