Analysis of estrogen-regulated enhancer RNAs identifies a functional motif required for enhancer assembly and gene expression.
Analysis of estrogen-regulated enhancer RNAs identifies a functional motif required for enhancer assembly and gene expression.
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DOI:
10.1016/j.celrep.2022.110944
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发表时间:
2022-06-14
期刊:
影响因子:
8.8
通讯作者:
Kraus, W. Lee
中科院分区:
文献类型:
--
作者:
Hou, Tim Y.;Kraus, W. Lee
To better understand the functions of non-coding enhancer RNAs (eRNAs), we annotated the estrogen-regulated eRNA transcriptome in estrogen receptor α (ERα)-positive breast cancer cells using PRO-cap and RNA sequencing. We then cloned a subset of the eRNAs identified, fused them to single guide RNAs, and targeted them to their ERα enhancers of origin using CRISPR/dCas9. Some of the eRNAs tested modulated the expression of cognate, but not heterologous, target genes after estrogen treatment by increasing ERα recruitment and stimulating p300-catalyzed H3K27 acetylation at the enhancer. We identified a ~40 nucleotide functional eRNA regulatory motif (FERM) present in many eRNAs that was necessary and sufficient to modulate gene expression, but not the specificity of activation, after estrogen treatment. The FERM interacted with BCAS2, an RNA-binding protein amplified in breast cancers. The ectopic expression of a targeted eRNA controlling the expression of an oncogene resulted in increased cell proliferation, demonstrating the regulatory potential of eRNAs in breast cancer. Hou and Kraus show that some eRNAs fused to sgRNAs can be targeted back to their ERα enhancers to stimulate ERα recruitment, p300-catalyzed H3K27 acetylation, and estrogen-dependent target gene expression. They discovered a conserved functional eRNA regulatory motif (FERM) in some eRNAs that mediates the effects of the functional eRNAs.
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DOI:
10.1073/pnas.1324151111
发表时间:
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影响因子:
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