Multiple assembly mechanisms anchor the KMN spindle checkpoint platform at human mitotic kinetochores.
Multiple assembly mechanisms anchor the KMN spindle checkpoint platform at human mitotic kinetochores.
复制标题
DOI:
10.1083/jcb.201407074
复制
发表时间:
2015-01-19
期刊:
影响因子:
--
通讯作者:
Yu H
中科院分区:
文献类型:
--
作者:
Kim S;Yu H
During mitosis in human cells, separate mechanisms involving Aurora B and CENP-T promote anchoring of the microtubule- and checkpoint-receptor complex KMN at kinetochores. During mitosis, the spindle checkpoint senses kinetochores not properly attached to spindle microtubules and prevents precocious sister-chromatid separation and aneuploidy. The constitutive centromere-associated network (CCAN) at inner kinetochores anchors the KMN network consisting of Knl1, the Mis12 complex (Mis12C), and the Ndc80 complex (Ndc80C) at outer kinetochores. KMN is a critical kinetochore receptor for both microtubules and checkpoint proteins. Here, we show that nearly complete inactivation of KMN in human cells through multiple strategies produced strong checkpoint defects even when all kinetochores lacked microtubule attachment. These KMN-inactivating strategies reveal multiple KMN assembly mechanisms at human mitotic kinetochores. In one mechanism, the centromeric kinase Aurora B phosphorylates Mis12C and strengthens its binding to the CCAN subunit CENP-C. In another, CENP-T contributes to KMN attachment in a CENP-H-I-K–dependent manner. Our study provides insights into the mechanisms of mitosis-specific assembly of the checkpoint platform KMN at human kinetochores.
登录
查看更多内容
DOI:
10.1038/nrm3494
发表时间:
2013-01
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
48
作者:
Mali, Prashant;Esvelt, Kevin M.;Church, George M.
通讯作者:
Church, George M.
DOI:
10.1083/jcb.201301006
发表时间:
2013-04-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Gascoigne KE;Cheeseman IM
通讯作者:
Cheeseman IM
影响因子:
64.5
作者:
Hori, Tetsuya;Amano, Miho;Fukagawa, Tatsuo
通讯作者:
Fukagawa, Tatsuo
影响因子:
64.5
作者:
Black BE;Cleveland DW
通讯作者:
Cleveland DW