Rapid Rates of Pol II Elongation in the Drosophila Embryo.
Rapid Rates of Pol II Elongation in the Drosophila Embryo.
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DOI:
10.1016/j.cub.2017.03.069
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发表时间:
2017-05-08
期刊:
影响因子:
--
通讯作者:
Levine M
中科院分区:
文献类型:
--
作者:
Fukaya T;Lim B;Levine M
Elongation of RNA polymerase II (Pol II) is thought to be an important mechanism for regulating gene expression [1]. We measured the first wave of de novo transcription in livingDrosophilaembryos using dual-fluorescence detection of nascent transcripts containing 5′ MS2 and 3′ PP7 RNA stem loops. Pol II elongation rates of 2.4–3.0 kb/min were observed, approximately twice as fast as earlier estimates [2–6]. The revised rates permit substantial levels of zygotic gene activity prior to the mid-blastula transition. We also provide evidence that variable rates of elongation are not a significant source of differential gene activity, suggesting that transcription initiation and Pol II release are the key determinants of gene control in development.
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