Reconstitution and mechanistic dissection of the human microtubule branching machinery.
Reconstitution and mechanistic dissection of the human microtubule branching machinery.
复制标题
人体微管分支机器的重建和机械解剖
DOI:
10.1083/jcb.202109053
复制
发表时间:
2022-07-04
期刊:
影响因子:
--
通讯作者:
中科院分区:
文献类型:
--
作者:
Zhang et al. reconstitute branching microtubule nucleation using native and recombinant human augmin–γ-TuRC complex and highlight the importance of the adaptor protein NEDD1 and CDK1/PLK1-mediated phosphorylation in this process. This study also unravels a novel augmin’s oligomerization-dependent mechanism for γ-TuRC activation. Branching microtubule (MT) nucleation is mediated by the augmin complex and γ-tubulin ring complex (γ-TuRC). However, how these two complexes work together to promote this process remains elusive. Here, using purified components from native and recombinant sources, we demonstrate that human augmin and γ-TuRC are sufficient to reconstitute the minimal MT branching machinery, in which NEDD1 bridges between augmin holo complex and GCP3/MZT1 subcomplex of γ-TuRC. The single-molecule experiment suggests that oligomerization of augmin may activate the branching machinery. We provide direct biochemical evidence that CDK1- and PLK1-dependent phosphorylation are crucial for NEDD1 binding to augmin, for their synergistic MT-binding activities, and hence for branching MT nucleation. In addition, we unveil that NEDD1 possesses an unanticipated intrinsic affinity for MTs via its WD40 domain, which also plays a pivotal role in the branching process. In summary, our study provides a comprehensive understanding of the underlying mechanisms of branching MT nucleation in human cells.
登录
查看更多内容
影响因子:
21.3
作者:
通讯作者:
--
DOI:
10.1073/pnas.1106223108
发表时间:
2011-07-12
影响因子:
11.1
作者:
Johmura, Yoshikazu;Soung, Nak-Kyun;Lee, Kyung S.
通讯作者:
Lee, Kyung S.
影响因子:
7.8
作者:
Haren, Laurence;Remy, Marie-Helene;Bazin, Ingrid;Callebaut, Isabelle;Wright, Michel;Merdes, Andreas
通讯作者:
Merdes, Andreas
影响因子:
7.8
作者:
Goshima, Gohta;Mayer, Mirjam;Zhang, Nan;Stuurman, Nico;Vale, Ronald D.
通讯作者:
Vale, Ronald D.
影响因子:
2.4
作者:
Chen JWC;Chen ZA;Rogala KB;Metz J;Deane CM;Rappsilber J;Wakefield JG
通讯作者:
Wakefield JG