The Evf2 Ultraconserved Enhancer lncRNA Functionally and Spatially Organizes Megabase Distant Genes in the Developing Forebrain.
The Evf2 Ultraconserved Enhancer lncRNA Functionally and Spatially Organizes Megabase Distant Genes in the Developing Forebrain.
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DOI:
10.1016/j.molcel.2018.07.024
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发表时间:
2018-09-20
期刊:
影响因子:
16
通讯作者:
Kohtz JD
中科院分区:
文献类型:
--
作者:
Cajigas I;Chakraborty A;Swyter KR;Luo H;Bastidas M;Nigro M;Morris ER;Chen S;VanGompel MJW;Leib D;Kohtz SJ;Martina M;Koh S;Ay F;Kohtz JD
Gene regulation requires selective targeting of DNA regulatory enhancers over megabase (Mb) distances. Here, we show that Evf2, a cloud-forming Dlx5/6 ultraconserved enhancer (UCE) lncRNA simultaneously localizes to activated (Umad1, 1.6Mb distant) and repressed (Akr1b8, 27Mb distant) chr6 target genes, precisely regulating UCE-gene distances and cohesin binding in mouse embryonic forebrain GABAergic interneurons (INs). Transgene expression of Evf2 activates Lsm8 (12Mb distant), but fails to repress Akr1b8, supporting trans-activation and long-range cis repression. Through both short-range (Dlx6 anti-sense) and long-range (Akr1b8) repression, the Evf2–5’UCE links homeodomain and mevalonate pathway regulated enhancers to interneuron diversity. The Evf2–3’ end is required for long-range activation, but dispensable for RNA cloud localization, functionally dividing the RNA into 3’-activator and 5’UCE-repressor/targeting regions. Together, these results support that Evf2 selectively regulates UCE interactions with multi-megabase distant genes through complex effects on chromosome topology, linking lncRNA-dependent topological and transcriptional control with interneuron diversity and seizure susceptibility.
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