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論文
  • 論文題目
    MAP2K6 remodels chromatin and facilitates reprogramming by activating Gatad2b-phosphorylation dependent heterochromatin loosening
  • 作者
    Guangsuo Xing, Zichao Liu, Luyuan Huang, Danyun Zhao, Tao Wang, Hao Yuan, Yi Wu, Linpeng Li, Qi Long, Yanshuang Zhou, Zhihong Hao, Yang Liu, Jianghuan Lu, Shiting Li, Jieying Zhu, Bo Wang, Junwei Wang, Jing Liu, Jiekai Chen, Duanqing Pei*, Xingguo Liu*, Keshi Chen*
  • 論文出處
  • 刊物名稱
    Cell Death & Differentiation
  • 年卷期頁
    2022, 29, 5, 1042-1054
  • 聯(lián)系作者
    Xingguo Liu
  • 影響因子
    12.073
  • 摘要
     Somatic cell reprogramming is an ideal model for studying epigenetic regulation as it undergoes dramatic chromatin remodeling. However, a role for phosphorylation signaling in chromatin protein modifications for reprogramming remains unclear. Here, we identified mitogen-activated protein kinase kinase 6 (Mkk6) as a chromatin relaxer and found that it could significantly enhance reprogramming. The function of Mkk6 in heterochromatin loosening and reprogramming requires its kinase activity but does not depend on its best-known target, P38. We identified Gatad2b as a novel target of Mkk6 phosphorylation that acts downstream to elevate histone acetylation levels and loosen heterochromatin. As a result, Mkk6 over-expression facilitates binding of Sox2 and Klf4 to their targets and promotes pluripotency gene expression during reprogramming. Our studies not only reveal an Mkk phosphorylation mediated modulation of chromatin status in reprogramming, but also provide new rationales to further investigate and improve the cell fate determination processes.
  • 英文摘要
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