期刊
JOURNAL OF CELL BIOLOGY
卷 218, 期 3, 页码 871-894出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1083/jcb.201804183
关键词
-
类别
资金
- Wellcome Trust/Department of Biotechnology India Alliance Intermediate Fellowship [IA/I/12/500523]
- Science and Engineering Research Board grant [EMR/2017/002273]
- IIS ER Mohali
- CSIR University Grants Commission (UGC)
- CSIR (Government of India)
- Department of Biotechnology (Government of India)
- Regional Centre for Biotechnology, Faridabad
Hook proteins are evolutionarily conserved dynein adaptors that promote assembly of highly processive dynein-dynactin motor complexes. Mammals express three Hook paralogs, namely Hook1, Hook2, and Hook3, that have distinct subcellular localizations and expectedly, distinct cellular functions. Here we demonstrate that Hook2 binds to and promotes dynein-dynactin assembly specifically during mitosis. During the late G2 phase, Hook2 mediates dynein-dynactin localization at the nuclear envelope (NE), which is required for centrosome anchoring to the NE. Independent of its binding to dynein, Hook2 regulates microtubule nucleation at the centrosome; accordingly, Hook2-depleted cells have reduced astral microtubules and spindle positioning defects. Besides the centrosome, Hook2 localizes to and recruits dynactin and dynein to the central spindle. Dynactin-dependent targeting of centralspindlin complex to the midzone is abrogated upon Hook2 depletion; accordingly, Hook2 depletion results in cytokinesis failure. We find that the zebrafish Hook2 homologue promotes dynein-dynactin association and was essential for zebrafish early development. Together, these results suggest that Hook2 mediates assembly of the dynein-dynactin complex and regulates mitotic progression and cytokinesis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据