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CDK11需要一個(gè)關(guān)鍵的激活子SAP30BP來調(diào)節(jié)pre-mRNA剪接

更新時(shí)間:2024-12-28  |  點(diǎn)擊率:108

202312月,中國科學(xué)院分子細(xì)胞科學(xué)研究中心;中國科學(xué)院上海生物化學(xué)與細(xì)胞生物學(xué)研究所;中國科學(xué)院RNA科學(xué)與工程重點(diǎn)實(shí)驗(yàn)室;武漢大學(xué)生命科學(xué)學(xué)院;太康生命與醫(yī)學(xué)科學(xué)中心;RNA研究所;湖北省細(xì)胞穩(wěn)態(tài)重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院分析化學(xué)分離科學(xué)重點(diǎn)實(shí)驗(yàn)室;武漢中國科學(xué)院大連化學(xué)物理研究所國家色譜研究中心;中國科學(xué)院大學(xué)杭州高等研究院生命科學(xué)學(xué)院浙江省系統(tǒng)健康科學(xué)重點(diǎn)實(shí)驗(yàn)室(Key Laboratory of RNA Science and Engineering, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China;College of Life Sciences, TaiKang Center for Life and Medical Sciences, RNA Institute, Hubei Key Laboratory of Cell Homeostasis, Wuhan University, Wuhan, ChinaCAS Key Laboratory of Separation Sciences for Analytical Chemistry,  National Chromatographic R&A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China;Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences,Hangzhou, China) Jing Fan老師研究團(tuán)隊(duì)在《The EMBO Journal》上發(fā)表論文:

CDK11 requires a critical activator SAP30BP to regulate pre-mRNA splicing"

 

CDK11需要一個(gè)關(guān)鍵的激活子SAP30BP來調(diào)節(jié)pre-mRNA剪接"

 

Abstract

CDK11 is an emerging druggable target for cancer therapy due to its prevalent roles in phosphorylating critical transcription and splicing factors and in facilitating cell cycle progression in cancer cells. Like other cyclin-dependent kinases, CDK11 requires its cognate cyclin, cyclin L1 or cyclin L2, for activation. However, little is known about how CDK11 activities might be modulated by other regulators. In this study, we show that CDK11 forms a tight complex with cyclins L1/L2 and SAP30BP, the latter of which is a poorly characterized factor. Acute degradation of SAP30BP mirrors that of CDK11 in causing widespread and strong defects in pre-mRNA splicing. Furthermore, we demonstrate that SAP30BP facilitates CDK11 kinase activities in vitro and in vivo, through ensuring the stabilities and the assembly of cyclins L1/L2 with CDK11. Together, these findings uncover SAP30BP as a critical CDK11 activator that regulates global pre-mRNA splicing.


摘要:

CDK11是一個(gè)新興的癌癥治療藥物靶點(diǎn),因?yàn)樗诹姿峄P(guān)鍵轉(zhuǎn)錄和剪接因子以及促進(jìn)癌細(xì)胞細(xì)胞周期進(jìn)程中發(fā)揮著普遍作用。像其他細(xì)胞周期蛋白依賴性激酶一樣,CDK11需要其同源細(xì)胞周期蛋白,細(xì)胞周期蛋白L1或細(xì)胞周期蛋白L2來激活。然而,對于CDK11的活性如何被其他調(diào)節(jié)因子調(diào)節(jié),研究人員所知甚少。在這項(xiàng)研究中,研究人員發(fā)現(xiàn)CDK11與細(xì)胞周期蛋白L1/L2SAP30BP形成緊密復(fù)合物,后者是一個(gè)特征不明顯的因子。SAP30BP的急性降解與CDK11一樣,在pre-mRNA剪接中引起廣泛而強(qiáng)烈的缺陷。此外,研究人員證明SAP30BP通過確保細(xì)胞周期蛋白L1/L2CDK11的穩(wěn)定性和組裝,促進(jìn)了CDK11激酶在體外和體內(nèi)的活性。綜上所述,這些發(fā)現(xiàn)揭示了SAP30BP作為一個(gè)關(guān)鍵的CDK11激活因子,調(diào)控全局pre-mRNA剪接。

 

該論文中,HeLa HAP1細(xì)胞的體外培養(yǎng)是使用Ausbian特級胎牛血清完成的。


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