Revealing RCOR2 as a regulatory component of nuclear speckles.

Revealing RCOR2 as a regulatory component of nuclear speckles.
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DOI:
10.1186/s13072-021-00425-4
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发表时间:
2021-11-24
影响因子:
3.9
通讯作者:
Andrés ME
Andrés ME
中科院分区:
生物学2区
文献类型:
--
作者:
Rivera C;Verbel-Vergara D;Arancibia D;Lappala A;González M;Guzmán F;Merello G;Lee JT;Andrés ME

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核过程,如转录和RNA成熟,可以受到凝聚物和核体中的亚核区室化的影响。在这里,我们的特点是由REST辅阻遏物2(RCOR 2),多能性维持和中枢神经系统发育所必需的核蛋白形成的核颗粒的性质。使用生物化学方法和高分辨率显微镜,我们揭示了RCOR 2定位于多种细胞类型的核斑点中,包括大脑中的神经元。RCOR 2与核斑点组分如SON、SRSF 7和SRRM 2形成复合物。当细胞暴露于化学应激时,RCOR 2表现为核斑点的核心成分,并由RNA稳定。反过来,核斑点形态似乎取决于RCOR 2。具体而言,RCOR 2敲低导致更大的核斑点,而过表达RCOR 2导致更小和更圆的核斑点。我们的研究表明,RCOR 2是核斑点体的调节组分,将这种共阻遏蛋白设定为控制核斑点行为的因子。在线版本包含补充材料,可通过10.1186/s13072-021-00425-4获得。
Nuclear processes such as transcription and RNA maturation can be impacted by subnuclear compartmentalization in condensates and nuclear bodies. Here, we characterize the nature of nuclear granules formed by REST corepressor 2 (RCOR2), a nuclear protein essential for pluripotency maintenance and central nervous system development. Using biochemical approaches and high-resolution microscopy, we reveal that RCOR2 is localized in nuclear speckles across multiple cell types, including neurons in the brain. RCOR2 forms complexes with nuclear speckle components such as SON, SRSF7, and SRRM2. When cells are exposed to chemical stress, RCOR2 behaves as a core component of the nuclear speckle and is stabilized by RNA. In turn, nuclear speckle morphology appears to depend on RCOR2. Specifically, RCOR2 knockdown results larger nuclear speckles, whereas overexpressing RCOR2 leads to smaller and rounder nuclear speckles. Our study suggests that RCOR2 is a regulatory component of the nuclear speckle bodies, setting this co-repressor protein as a factor that controls nuclear speckles behavior. The online version contains supplementary material available at 10.1186/s13072-021-00425-4.
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