Meiotic regulation of TPX2 protein levels governs cell cycle progression in mouse oocytes.
Meiotic regulation of TPX2 protein levels governs cell cycle progression in mouse oocytes.
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DOI:
10.1371/journal.pone.0003338
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发表时间:
2008-10-03
期刊:
影响因子:
3.7
通讯作者:
Verlhac MH
中科院分区:
文献类型:
--
作者:
Brunet S;Dumont J;Lee KW;Kinoshita K;Hikal P;Gruss OJ;Maro B;Verlhac MH
Formation of female gametes requires acentriolar spindle assembly during meiosis. Mitotic spindles organize from centrosomes and via local activation of the RanGTPase on chromosomes. Vertebrate oocytes present a RanGTP gradient centred on chromatin at all stages of meiotic maturation. However, this gradient is dispensable for assembly of the first meiotic spindle. To understand this meiosis I peculiarity, we studied TPX2, a Ran target, in mouse oocytes. Strikingly, TPX2 activity is controlled at the protein level through its accumulation from meiosis I to II. By RNAi depletion and live imaging, we show that TPX2 is required for spindle assembly via two distinct functions. It controls microtubule assembly and spindle pole integrity via the phosphorylation of TACC3, a regulator of MTOCs activity. We show that meiotic spindle formation in vivo depends on the regulation of at least a target of Ran, TPX2, rather than on the regulation of the RanGTP gradient itself.
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影响因子:
7.8
作者:
Kufer, Thomas A;Sillje, Herman H W;Korner, Roman;Gruss, Oliver J;Meraldi, Patrick;Nigg, Erich A
通讯作者:
Nigg, Erich A
影响因子:
7.8
作者:
Kinoshita, Kazuhisa;Noetzel, Tim L;Pelletier, Laurence;Mechtler, Karl;Drechsel, David N;Schwager, Anne;Lee, Mike;Raff, Jordan W;Hyman, Anthony A
通讯作者:
Hyman, Anthony A
DOI:
10.1083/jcb.200202052
发表时间:
2002-05-13
期刊:
The Journal of cell biology
影响因子:
--
作者:
Lefebvre C;Terret ME;Djiane A;Rassinier P;Maro B;Verlhac MH
通讯作者:
Verlhac MH
影响因子:
21.3
作者:
Reis, Alexandra;Madgwick, Suzanne;Chang, Heng-Yu;Nabti, Ibtissem;Levasseur, Mark;Jones, Keith T.
通讯作者:
Jones, Keith T.
影响因子:
64.5
作者:
Gruss, OJ;Carazo-Salas, RE;Mattaj, IW
通讯作者:
Mattaj, IW