Charlesworth Amanda, Ridge John A, King Leslie A, MacNicol Melanie C, MacNicol Angus M
Department of Anatomy and Neurobiology, University of Arkansas for Medical Sciences, 4301 West Markham Street Slot 814, Little Rock, AR 72205, USA.
EMBO J. 2002 Jun 3;21(11):2798-806. doi: 10.1093/emboj/21.11.2798.
Progression through vertebrate oocyte maturation requires that pre-existing, maternally derived mRNAs be translated in a strict temporal order. The mechanism that controls the timing of oocyte mRNA translation is unknown. In this study we show that the early translational induction of the mRNA encoding the Mos proto-oncogene is mediated through a novel regulatory element within the 3' untranslated region of the Mos mRNA. This novel element is responsive to the MAP kinase signaling pathway and is distinct from the late acting, cdc2-responsive, cytoplasmic polyadenylation element. Our findings suggest that the timing of maternal mRNA translation is controlled through signal transduction pathways targeting distinct 3' UTR mRNA elements.
脊椎动物卵母细胞成熟过程的进展要求预先存在的母源mRNA按照严格的时间顺序进行翻译。控制卵母细胞mRNA翻译时间的机制尚不清楚。在本研究中,我们表明,编码Mos原癌基因的mRNA的早期翻译诱导是通过Mos mRNA 3'非翻译区内的一个新调控元件介导的。这个新元件对MAP激酶信号通路有反应,并且不同于起后期作用的、对cdc2有反应的细胞质聚腺苷酸化元件。我们的发现表明,母源mRNA翻译的时间是通过靶向不同3'UTR mRNA元件的信号转导途径来控制的。