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CENP-T-W-S-X forms a unique centromeric chromatin structure with a histone-like fold.着丝粒蛋白-T-W-S-X 形成具有组蛋白样折叠的独特着丝粒染色质结构。
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2
New centromeric component CENP-W is an RNA-associated nuclear matrix protein that interacts with nucleophosmin/B23 protein.新着丝粒成分 CENP-W 是一种与核基质蛋白相互作用的 RNA 相关核基质蛋白,与核仁磷酸蛋白/B23 蛋白相互作用。
J Biol Chem. 2011 Dec 9;286(49):42758-42769. doi: 10.1074/jbc.M111.228411. Epub 2011 Oct 14.
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Cug2 is essential for normal mitotic control and CNS development in zebrafish.Cug2对斑马鱼正常的有丝分裂控制和中枢神经系统发育至关重要。
BMC Dev Biol. 2011 Aug 15;11:49. doi: 10.1186/1471-213X-11-49.
4
CSN5/Jab1 controls multiple events in the mammalian cell cycle.CSN5/Jab1 控制哺乳动物细胞周期中的多个事件。
FEBS Lett. 2010 Nov 19;584(22):4545-52. doi: 10.1016/j.febslet.2010.10.039. Epub 2010 Oct 26.
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JAB1/CSN5: a new player in cell cycle control and cancer.JAB1/CSN5:细胞周期调控和癌症的新角色
Cell Div. 2010 Oct 18;5:26. doi: 10.1186/1747-1028-5-26.
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Essential roles of Jab1 in cell survival, spontaneous DNA damage and DNA repair.Jab1 在细胞存活、自发 DNA 损伤和 DNA 修复中的基本作用。
Oncogene. 2010 Nov 18;29(46):6125-37. doi: 10.1038/onc.2010.345. Epub 2010 Aug 30.
7
The fate of metaphase kinetochores is weighed in the balance of SUMOylation during S phase.有丝分裂中期动粒的命运在 S 期 SUMOylation 的平衡中被权衡。
Cell Cycle. 2010 Aug 15;9(16):3194-201. doi: 10.4161/cc.9.16.12619. Epub 2010 Aug 9.
8
Cancer-upregulated gene 2 (CUG2) overexpression induces apoptosis in SKOV-3 cells.癌基因上调基因 2(CUG2)过表达诱导 SKOV-3 细胞凋亡。
Cell Biochem Funct. 2010 Aug;28(6):461-8. doi: 10.1002/cbf.1678.
9
Cancer-upregulated gene 2 (CUG2), a new component of centromere complex, is required for kinetochore function.癌症上调基因2(CUG2)是着丝粒复合体的一个新组分,是动粒功能所必需的。
Mol Cells. 2009 Jun 30;27(6):697-701. doi: 10.1007/s10059-009-0083-2. Epub 2009 Jun 12.
10
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CSN5/JAB1 与着丝粒组件 CENP-T 和 CENP-W 相互作用,并调节它们的蛋白酶体介导的降解。

CSN5/JAB1 interacts with the centromeric components CENP-T and CENP-W and regulates their proteasome-mediated degradation.

机构信息

Department of Microbiology and Molecular Biology, Chungnam National University, Daejeon 305-764, Korea.

Department of Microbiology and Molecular Biology, Chungnam National University, Daejeon 305-764, Korea.

出版信息

J Biol Chem. 2013 Sep 20;288(38):27208-27219. doi: 10.1074/jbc.M113.469221. Epub 2013 Aug 7.

DOI:10.1074/jbc.M113.469221
PMID:23926101
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3779718/
Abstract

The CENP-T·CENP-W complex is a recently identified inner centromere component that plays crucial roles in the formation of a functional kinetochore involved in cell division during mitosis. Using yeast two-hybrid screening, we identified an interaction between CENP-T and CSN5, the fifth component of the COP9 signalosome and a key modulator of the cell cycle and cancer. Co-immunoprecipitation revealed that CSN5 directly interacts with both CENP-T and CENP-W. Ectopically expressed CSN5 promoted the ubiquitin- and proteasome-dependent degradation of CENP-T·CENP-W. The formation of a CENP-T·CENP-W complex greatly enhanced the stabilities of the respective proteins, possibly by blocking CSN5-mediated degradation. Furthermore, dysregulation of CSN5 induced severe defects in the recruitment of CENP-T·CENP-W to the kinetochore during the prophase stage of mitosis. Thus, our results indicate that CSN5 regulates the stability of the inner kinetochore components CENP-T and CENP-W, providing the first direct link between CSN5 and the mitotic apparatus, highlighting the role of CSN5 as a multifunctional cell cycle regulator.

摘要

着丝点-T·着丝点-W 复合物是最近发现的一种内着丝点成分,在有丝分裂过程中参与细胞分裂的功能性动粒的形成中起着至关重要的作用。通过酵母双杂交筛选,我们鉴定出 CENP-T 与 CSN5 之间存在相互作用,CSN5 是 COP9 信号小体的第五个成分,是细胞周期和癌症的关键调节剂。共免疫沉淀显示 CSN5 直接与 CENP-T 和 CENP-W 相互作用。过表达的 CSN5 促进了 CENP-T·CENP-W 的泛素化和蛋白酶体依赖性降解。CENP-T·CENP-W 复合物的形成大大增强了各自蛋白质的稳定性,可能通过阻断 CSN5 介导的降解。此外,CSN5 的失调导致 CENP-T·CENP-W 在有丝分裂前期向动粒的募集严重缺陷。因此,我们的结果表明 CSN5 调节着丝点内动粒成分 CENP-T 和 CENP-W 的稳定性,为 CSN5 与有丝分裂装置之间提供了第一个直接联系,突出了 CSN5 作为多功能细胞周期调节剂的作用。