Whole-genome screening identifies proteins localized to distinct nuclear bodies.

Whole-genome screening identifies proteins localized to distinct nuclear bodies.
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全基因组筛选鉴定定位于不同核体的蛋白质

DOI:
10.1083/jcb.201303145
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发表时间:
2013-10-14
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Chen J
Chen J
中科院分区:
其他
文献类型:
--
作者:
Fong KW;Li Y;Wang W;Ma W;Li K;Qi RZ;Liu D;Songyang Z;Chen J

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一个全基因组显微镜屏幕识别蛋白定位到卡哈尔体,paraspeckles,和其他已知的和以前未知的核亚室。细胞核是一种独特的细胞器,在染色体区域中含有必需的遗传物质。染色质间空间由核亚区室组成,所述核亚区室由被认为是DNA或RNA加工的工厂以及转录和/或转录后调节的位点的几个不同的核体限定。在本文中,我们进行了一个全基因组显微镜为基础的筛选蛋白质,形成核灶,并利用已知的核体标记物,其特点是本地化。我们总共鉴定了325种定位于不同核体的蛋白质,包括核仁(148)、早幼粒细胞白血病核体(38)、核斑点(27)、副斑点(24)、Cajal小体(17)、Sam 68核体(5)、Polycomb小体(2)和未表征的核体(64)。功能验证揭示了几种蛋白质可能参与Cajal体和paraspeckles的组装。这些数据共同建立了不同核体中人类蛋白质的第一个图谱,并为核体研究提供了关键信息。
A genome-wide microscopy screen identifies proteins localized to Cajal bodies, paraspeckles, and other known and previously uncharacterized nuclear subcompartments. The nucleus is a unique organelle that contains essential genetic materials in chromosome territories. The interchromatin space is composed of nuclear subcompartments, which are defined by several distinctive nuclear bodies believed to be factories of DNA or RNA processing and sites of transcriptional and/or posttranscriptional regulation. In this paper, we performed a genome-wide microscopy-based screening for proteins that form nuclear foci and characterized their localizations using markers of known nuclear bodies. In total, we identified 325 proteins localized to distinct nuclear bodies, including nucleoli (148), promyelocytic leukemia nuclear bodies (38), nuclear speckles (27), paraspeckles (24), Cajal bodies (17), Sam68 nuclear bodies (5), Polycomb bodies (2), and uncharacterized nuclear bodies (64). Functional validation revealed several proteins potentially involved in the assembly of Cajal bodies and paraspeckles. Together, these data establish the first atlas of human proteins in different nuclear bodies and provide key information for research on nuclear bodies.
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