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中山大学中山医学院干细胞与组织工程研究中心,广东 广州 510080
ZHONG Xiao-min;E-mail:zhongxm23@mail.sysu.edu.cn
Received:13 October 2020,
Published:20 January 2021
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巫孟师,熊敏敏,彭丹等.构建MS2-RIP方法用于鉴定lncRNA DANCR在肿瘤细胞中的相互作用分子[J].中山大学学报(医学科学版),2021,42(01):24-32.
WU Meng-shi,XIONG Min-min,PENG Dan,et al.MS2-RIP Assay for Identifying the Interaction Partners of lncRNA DANCR in Tumor Cells[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(01):24-32.
目的
2
为了探讨lncRNA DANCR在肿瘤细胞中的作用机制,本研究拟构建一种新的MS2-RIP方法用于鉴定DANCR的相互作用分子。
方法
2
利用MS2噬菌体衣壳蛋白可与噬菌体复制酶编码基因5’端一段由19个碱基组成的RNA茎环结构序列,即MS2结合位点(MS2 Binding Site,MS2 BS)高效结合的特点,构建串联表达MS2 BS和DANCR的过量表达质粒,通过MS2蛋白与MS2 BS的亲和作用,使DANCR得到富集,并且同步捕获与DANCR相互作用的分子,用于进一步分析鉴定。
结果
2
成功构建串联表达MS2 BS和DANCR的过量表达质粒用于MS2-RIP实验,该实验可显著富集DANCR以及作为阳性对照的DANCR结合蛋白EZH2。
结论
2
基于MS2蛋白与MS2结合位点的高效结合特性,我们针对lncRNA DANCR建立了MS2-RIP方法。该方法可有效富集DANCR以及与DANCR结合的生物活性分子,为研究DANCR的作用机制提供一种新的技术手段。
Objective
2
To explore the functional mechanism of lncRNA DANCR in tumor cells, a MS2-RIP method was designed and conducted to identify the molecules that interact with DANCR.
Methods
2
The specific binding of MS2 bacteriophage capsid protein and MS2 binding site (MS2 BS), a 19-base RNA stem-loop structure located at the 5′ terminus of the MS2 bacteriophage replicase gene, was applied to construct a plasmid for tandemly overexpressing DANCR and MS2 BS. DANCR was enriched and its associated molecules were further identified and analyzed.
Results
2
The plasmid for tandemly overexpressing DANCR and MS2 BS was successfully constructed for the MS2-RIP experiment, which could significantly enrich DANCR and DANCR-binding protein EZH2 as a positive control.
Conclusion
2
Based on the high affinity binding between MS2 protein and MS2 BS, the MS2-RIP method was established for lncRNA DANCR, which could effectively capture DANCR as well as its associated molecules, providing a new technology for studying the functional mechanism of DANCR.
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