Spindle-localized CPE-mediated translation controls meiotic chromosome segregation

被引:72
作者
Eliscovich, Carolina [1 ]
Peset, Isabel [1 ]
Vernos, Isabelle [1 ,2 ]
Mendez, Raul [1 ]
机构
[1] CRG, Barcelona 08003, Spain
[2] ICREA, Barcelona 08010, Spain
关键词
D O I
10.1038/ncb1746
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Meiotic progression requires the translational activation of stored maternal mRNAs, such as those encoding cyclin B1 or mos. The translation of these mRNAs is regulated by the cytoplasmic polyadenylation element (CPE) present in their 3'UTRs, which recruits the CPE-binding protein CPEB1. This RNA-binding protein not only dictates the timing and extent of translational activation by cytoplasmic polyadenylation(2,3) but also participates, together with the translational repressor Maskin, in the transport and localization, in a quiescent state, of its targets to subcellular locations where their translation will take place(4). During the early development of Xenopus laevis, CPEB localizes at the animal pole of oocytes and later on at embryonic spindles and centrosomes(5). Disruption of embryonic CPEB-mediated translational regulation results in abnormalities in the mitotic apparatus and inhibits embryonic mitosis(5). Here we show that spindle-localized translational activation of CPE-regulated mRNAs, encoding for proteins with a known function in spindle assembly and chromosome segregation, is essential for completion of the first meiotic division and for chromosome segregation in Xenopus oocytes.
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收藏
页码:858 / 865
页数:8
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