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Blood:LncRNA BGLT3调控胎儿γ球蛋白基因的表达

2018-08-28 MedSci MedSci原创

中心点:BGLT3是发育阶段特异性的lncRNA,位于HBG1下游,正性调节γ-球蛋白基因。BGLT3位点和转录本在增加γ球蛋白转录的循环和介质互作中发挥不同的功能。摘要:长链非编码RNAs(lncRNA)参与调控多种细胞生理过程,包括转录,受到越来越多的关注。鉴于lncRNAs具有高度细胞特异性,其可能参与调控不同细胞的独特转录谱,但其潜在机制尚未十分明确。BGLT3,由Aγ-球蛋白(HBG1)

中心点:

BGLT3是发育阶段特异性的lncRNA,位于HBG1下游,正性调节γ-球蛋白基因。

BGLT3位点和转录本在增加γ球蛋白转录的循环和介质互作中发挥不同的功能。

摘要:

长链非编码RNAs(lncRNA)参与调控多种细胞生理过程,包括转录,受到越来越多的关注。鉴于lncRNAs具有高度细胞特异性,其可能参与调控不同细胞的独特转录谱,但其潜在机制尚未十分明确。

BGLT3,由Aγ-球蛋白(HBG1)的下游序列编码的红系lncRNA,在红系细胞中与γ-球蛋白基因共转录。通过CRISPR/Case9敲除BGLT3发现其特异性调控γ-球蛋白基因。研究人员通过敲低或过表达RNA,以及抑制转录来区分转录本与基础序列的功能。

BGLT3位点的转录对γ-球蛋白基因和BGLT3序列之间的循环至关重要。与此相反,BGLT3转录本对γ-球蛋白/BGLT3循环来说可有可无,但会与染色质上的调节复合物相结合。BGLT3位点的操作不影响γ-球蛋白基因与β-球蛋白位点控制区域(LCR)的远程循环互作。

总而言之,BGLT3以发育阶段特异性的方式调节γ-球蛋白转录,与LCR协同增加γ-球蛋白基因启动子上的RNA Pol II(RNA合成酶)的密度,进而促进γ球蛋白转录。


原始出处:

Maria Soledad Ivaldi, et al. Fetal γ-globin genes are regulated by the BGLT3 long non-coding RNA locus. Blood  2018  :blood-2018-07-862003;  doi: https://doi.org/10.1182/blood-2018-07-862003

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    2019-03-12 xzw113
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    2018-08-30 xzw113
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    2018-08-30 liumin1987

    嗯嗯,学习了。

    0

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    2018-08-30 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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