基础医学与临床 ›› 2018, Vol. 38 ›› Issue (6): 776-779.

• 研究论文 • 上一篇    下一篇

SIRT6招募mRNA结合蛋白IMP1调控IGF2在293T细胞表达

王婷婷,吴洁,董海涛,徐徕,肖毅   

  1. 中国医学科学院北京协和医院
  • 收稿日期:2018-04-10 修回日期:2018-04-21 出版日期:2018-06-05 发布日期:2018-05-25
  • 通讯作者: 肖毅 E-mail:xiaoy@pumch.cn
  • 基金资助:
    国家自然科学基金

SIRT6 regulating IGF2 though recruiting mRNA binding protein IMP1 in 293T cells

  • Received:2018-04-10 Revised:2018-04-21 Online:2018-06-05 Published:2018-05-25

摘要: 目的 探讨SIRT6对肿瘤重要调节分子IGF2的转录后调控机制。方法 通过在工具细胞系293T细胞中过表达SIRT6以及应用免疫共沉淀(IP)方法富集所有可能与SIRT6相互作用的蛋白,行质谱实验鉴定,并进一步通过IP/Western blot方法,检测SIRT6和IGF2 mRNA结合蛋白(IMP1)的相互作用,以及SIRT6对IMP1的乙酰化/磷酸化修饰水平的影响。结果 质谱结果证明SIRT6和IMP1存在相互作用,并通过构建SIRT6和IMP1的过表达载体,进一步验证了SIRT6与IMP1的直接相互作用。检测乙酰化和磷酸化水平发现,SIRT6并未直接影响IMP1的乙酰化水平,而是促进其磷酸化修饰。结论SIRT6可能通过促进对IMP1的磷酸化而起到在转录后水平抑制细胞中IGF2 mRNA的作用。

关键词: SIRT6, IGF2, IMP1, 肿瘤调控分子

Abstract: Objective To investigate the post-transcriptional regulation mechanism of IGF2, which is an important tumor regulator, by SIRT6. Methods SIRT6 was overexpressed in 293T cells and IP was used to enrich SIRT6 and mass spectrometry(MS)was used to detect the protein that interacted with SIRT6.Western blot was used to validate the interacted protein and its acetylation factor 2 mRNA-binding protein 1(IMP1). SIRT6 did not change the acetylation modification status of IMP1 , but the phosphorylation modification status of IMP1 was elevated in the presence of SIRT6. Conclusion SIRT6 may regulate IGF2 though promoting the phosphorylation of IMP1 in 293T cells.

Key words: SIRT6, IGF2, IMP1, tumor regulator

中图分类号: