Znhit1 controls intestinal stem cell maintenance by regulating H2A.Z incorporation

Znhit1 controls intestinal stem cell maintenance by regulating H2A.Z incorporation
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Zhnit1 通过调节 H2A.Z 掺入来控制肠道干细胞的维持

DOI:
10.1038/s41467-019-09060-w
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发表时间:
2019-03
影响因子:
16.6
通讯作者:
Xinhua Lin
Xinhua Lin
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bing Zhao;Ying Chen;Ning Jiang;Li Yang;Shenfei Sun;Yan Zhang;Zengqi Wen;Lorraine Ray;Han Liu;Guoli Hou;Xinhua Lin

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lgr 5+干细胞对肠道上皮细胞的稳态至关重要;然而,这些细胞是如何维持的还不完全清楚。锌指HIT型含锌蛋白1(Znhit 1)是SRCAP染色体重塑复合物的进化上保守的亚基。目前,Znhit 1在体内的功能及其在SRCAP复合物中的作用机制尚不清楚。在这里,我们表明,在肠道上皮Znhit 1缺失耗尽LGR 5+干细胞,从而破坏出生后肠道内稳态的建立和维护。Znhit 1在机制上将组蛋白变体H2A.Z整合到参与Lgr 5+干细胞命运决定的基因的TSS区域,包括Lgr 5,Tgfb 1和Tgfbr 2,用于随后的转录调控。重要的是,Znhit 1通过控制YL 1磷酸化促进H2A.Z和YL 1(H2A.Z伴侣)之间的相互作用。这些结果表明Znhit 1/H2A.Z对于Lgr 5+干细胞维持和肠内稳态是必需的。我们的研究结果确定了Znhit 1/H2A.Z在体内控制哺乳动物器官发育和组织稳态中的主导作用。
Lgr5+ stem cells are crucial to gut epithelium homeostasis; however, how these cells are maintained is not fully understood. Zinc finger HIT-type containing 1 (Znhit1) is an evolutionarily conserved subunit of the SRCAP chromosome remodeling complex. Currently, the function of Znhit1 in vivo and its working mechanism in the SRCAP complex are unknown. Here we show that deletion of Znhit1 in intestinal epithelium depletes Lgr5+ stem cells thus disrupts intestinal homeostasis postnatal establishment and maintenance. Mechanistically, Znhit1 incorporates histone variant H2A.Z into TSS region of genes involved in Lgr5+ stem cell fate determination, including Lgr5, Tgfb1 and Tgfbr2, for subsequent transcriptional regulation. Importantly, Znhit1 promotes the interaction between H2A.Z and YL1 (H2A.Z chaperone) by controlling YL1 phosphorylation. These results demonstrate that Znhit1/H2A.Z is essential for Lgr5+ stem cell maintenance and intestinal homeostasis. Our findings identified a dominant role of Znhit1/H2A.Z in controlling mammalian organ development and tissue homeostasis in vivo.
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影响因子: 24.5
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