Widespread changes in the posttranscriptional landscape at the Drosophila oocyte-to-embryo transition.

Widespread changes in the posttranscriptional landscape at the Drosophila oocyte-to-embryo transition.
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DOI:
10.1016/j.celrep.2014.05.002
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发表时间:
2014-06-12
期刊:
影响因子:
8.8
通讯作者:
Orr-Weaver TL
Orr-Weaver TL
中科院分区:
生物学1区
文献类型:
--
作者:
Kronja I;Yuan B;Eichhorn SW;Dzeyk K;Krijgsveld J;Bartel DP;Orr-Weaver TL

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The oocyte-to-embryo transition marks the onset of development. The initial phase of this profound change from the differentiated oocyte to the totipotent embryo occurs in the absence of both transcription and mRNA degradation. Here we combine global polysome profiling, ribosome-footprint profiling, and quantitative mass spectrometry in a comprehensive approach to delineate the translational and proteomic changes at this important transition in Drosophila. Our results show that PNG kinase is a critical regulator of the extensive changes in the translatome, acting uniquely at this developmental window. Analysis of the proteome in png mutants provided insights into the contributions of translation to changes in protein levels, revealing a compensatory dynamic between translation and protein turnover during proteome remodeling at the return to totipotency. The proteome changes additionally suggested new regulators of meiosis and early embryogenesis, including the conserved H3K4 demethylase LID, which we demonstrated is required during this period despite transcriptional inactivity.
核糖体分析揭示了果蝇果蝇中普遍存在的终止密码子读取。
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影响因子: 4.4
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