The control of polycomb repressive complexes by long noncoding RNAs.

The control of polycomb repressive complexes by long noncoding RNAs.
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DOI:
10.1002/wrna.1657
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发表时间:
2021-11
期刊:
Wiley interdisciplinary reviews. RNA
影响因子:
--
通讯作者:
Calabrese JM
Calabrese JM
中科院分区:
其他
文献类型:
--
作者:
Trotman JB;Braceros KCA;Cherney RE;Murvin MM;Calabrese JM

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多梳抑制复合物 1 和 2(PRC;PRC1 和 PRC2)是保守的组蛋白修饰酶,通常协同作用来抑制基因表达。 PRCs 受长非编码 RNA (lncRNA) 以复杂的方式调控。一方面,特定的 lncRNA 导致 PRC 与染色质结合并抑制可跨越兆碱基的基因组区域的基因表达。另一方面,PRCs 结合 RNA 的序列特异性似乎很小,至少在 PRC2 的情况下,直接的 RNA 结合具有抑制酶的作用。因此,一些 RNA 似乎促进 PRC 活性,而另一些则可能抑制它。这种明显的二分法背后的原因尚不清楚。最有效的 PRC 激活 lncRNA 与染色质相关,并且主要是未剪接的或具有异常长的外显子。新数据表明,这些 lncRNA 通过在进化过程中快速出现和消失的内部 RNA 序列元件来促进 PRC 活性。这些序列元件可能通过与 RNA 结合蛋白的常见子集相互作用来发挥作用,这些蛋白在染色质上招募或稳定 PRCs。 RNA 与蛋白质和其他分子的相互作用 > 蛋白质-RNA 识别 RNA 与蛋白质和其他分子的相互作用 > RNA-蛋白质复合物 RNA 与蛋白质和其他分子的相互作用 > 蛋白质-RNA 相互作用:功能含义 本文分类如下:
The polycomb repressive complexes 1 and 2 (PRCs; PRC1 and PRC2) are conserved histone-modifying enzymes that often function cooperatively to repress gene expression. The PRCs are regulated by long noncoding RNAs (lncRNAs) in complex ways. On the one hand, specific lncRNAs cause the PRCs to engage with chromatin and repress gene expression over genomic regions that can span megabases. On the other hand, the PRCs bind RNA with seemingly little sequence specificity, and at least in the case of PRC2, direct RNA-binding has the effect of inhibiting the enzyme. Thus, some RNAs appear to promote PRC activity, while others may inhibit it. The reasons behind this apparent dichotomy are unclear. The most potent PRC-activating lncRNAs associate with chromatin and are predominantly unspliced or harbor unusually long exons. Emerging data imply that these lncRNAs promote PRC activity through internal RNA sequence elements that arise and disappear rapidly in evolutionary time. These sequence elements may function by interacting with common subsets of RNA-binding proteins that recruit or stabilize PRCs on chromatin. RNA Interactions with Proteins and Other Molecules > Protein-RNA Recognition RNA Interactions with Proteins and Other Molecules > RNA-Protein Complexes RNA Interactions with Proteins and Other Molecules > Protein-RNA Interactions: Functional Implications This article is categorized under:
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影响因子: --
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