mRNA 3' uridylation and poly(A) tail length sculpt the mammalian maternal transcriptome.

mRNA 3' uridylation and poly(A) tail length sculpt the mammalian maternal transcriptome.
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DOI:
10.1038/nature23318
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发表时间:
2017-08-17
期刊:
影响因子:
64.8
通讯作者:
O'Carroll D
O'Carroll D
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Morgan M;Much C;DiGiacomo M;Azzi C;Ivanova I;Vitsios DM;Pistolic J;Collier P;Moreira PN;Benes V;Enright AJ;O'Carroll D

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生物学的一个基本原则是,早期发育的程序是在卵子发生期间以母体转录组的形式建立的。母体转录组如何获得适当的转录物含量和剂量还不完全清楚。在这里,我们发现TUT 4/7介导的mRNA 3′末端尿苷酸化通过消除卵母细胞生长过程中的转录物来塑造小鼠母体转录组。TUT 4/7介导的尿苷酸化对于卵母细胞成熟和生育力都是必不可少的。与体细胞相比,卵母细胞转录组显示出较短的poly(A)尾长和较高的末端寡聚尿苷酸化相对比例。TUT 4/7缺失导致大量转录本的积累,这些转录本具有非常短的poly(A)尾和3′寡尿苷酸化的缺失。相反,TUT 4/7缺陷不会改变多种体细胞中的基因表达。总之,我们显示了poly(A)尾长和3′末端尿苷酸化在塑造功能性母体转录组中的重要和特异性功能。
A fundamental principle in biology is that the program for early development is established during oogenesis in the form of the maternal transcriptome. How the maternal transcriptome acquires the appropriate content and dosage of transcripts is not fully understood. Here we show that TUT4/7-mediated mRNA 3′ terminal uridylation sculpts the mouse maternal transcriptome by eliminating transcripts during oocyte growth. TUT4/7-mediated uridylation is essential for both oocyte maturation and fertility. In comparison to somatic cells, the oocyte transcriptome displays shorter poly(A) tail length and a high relative proportion of terminal oligo-uridylation. TUT4/7 deletion leads to the accumulation of a cohort of transcripts with a high frequency of very short poly(A) tails and a loss of 3′ oligo-uridylation. In contrast, TUT4/7-deficiency does not alter gene expression in a variety of somatic cells. In summary, we show essential and specific functions for poly(A) tail length and 3′ terminal uridylation in sculpting a functional maternal transcriptome.
小鼠卵母细胞发育能力所需的母体因素 非包围核仁 (NSN) 和包围核仁 (SN) 卵母细胞的转录组分析
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