Reciprocal interaction between SIRT6 and APC/C regulates genomic stability.

Reciprocal interaction between SIRT6 and APC/C regulates genomic stability.
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SIRT6 和 APC/C 之间的相互作用调节基因组稳定性

DOI:
10.1038/s41598-021-93684-w
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发表时间:
2021-07-09
期刊:
影响因子:
4.6
通讯作者:
Deng H
Deng H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang H;Feng K;Wang Q;Deng H

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SIRT6是一种依赖NAD+的去乙酰化酶,在有丝分裂保真度和基因组稳定性中起重要作用。在本研究中,我们发现SIRT6过表达导致有丝分裂缺陷和非整倍体。我们发现SIRT6是后期促进复合体/环体(APC/C)的新型底物,APC/C是有丝分裂的主要调节因子。APC/C的共激活因子CDH1和CDC20通过泛素化-蛋白酶体途径介导SIRT6降解。反过来,SIRT6也使赖氨酸K135处的CDH1去乙酰化并促进其降解,导致APC/ c -CDH1靶向底物增加,中心体扩增功能障碍和染色体不稳定。我们的研究结果证明了SIRT6在有丝分裂过程中对基因组完整性的重要性,并揭示了SIRT6和APC/C如何合作驱动有丝分裂。
SIRT6 is an NAD+-dependent deacetylase that plays an important role in mitosis fidelity and genome stability. In the present study, we found that SIRT6 overexpression leads to mitosis defects and aneuploidy. We identified SIRT6 as a novel substrate of anaphase-promoting complex/cyclosome (APC/C), which is a master regulator of mitosis. Both CDH1 and CDC20, co-activators of APC/C, mediated SIRT6 degradation via the ubiquitination-proteasome pathway. Reciprocally, SIRT6 also deacetylated CDH1 at lysine K135 and promoted its degradation, resulting in an increase in APC/C-CDH1-targeted substrates, dysfunction in centrosome amplification, and chromosome instability. Our findings demonstrate the importance of SIRT6 for genome integrity during mitotic progression and reveal how SIRT6 and APC/C cooperate to drive mitosis.
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