LlamaTags: A Versatile Tool to Image Transcription Factor Dynamics in Live Embryos.

LlamaTags: A Versatile Tool to Image Transcription Factor Dynamics in Live Embryos.
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Llamatags:在活胚胎中图像转录因子动力学的多功能工具。

DOI:
10.1016/j.cell.2018.03.069
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发表时间:
2018-06-14
期刊:
影响因子:
64.5
通讯作者:
Garcia HG
Garcia HG
中科院分区:
生物学1区
文献类型:
--
作者:
Bothma JP;Norstad MR;Alamos S;Garcia HG

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Embryonic cell fates are defined by transcription factors that are rapidly deployed, yet attempts to visualize these factors in vivo often fail due to slow fluorescent protein maturation. Here we pioneer a protein tag, LlamaTag, which circumvents this maturation limit by binding mature fluorescent proteins, making it possible to visualize transcription factor concentration dynamics in live embryos. Implementing this approach in the fruit fly Drosophila melanogaster, we discovered stochastic bursts in the concentration of transcription factors that are correlated with bursts in transcription. We further used LlamaTags to show that the concentration of protein in a given nucleus depends heavily on transcription of that gene in neighboring nuclei; we speculate that this inter-nuclear signaling is an important mechanism for coordinating gene expression to delineate straight and sharp boundaries of gene expression. Thus, LlamaTags now make it possible to visualize the flow of information along the central dogma in live embryos. A fluorescent protein tagging strategy reveals a role for inter-nuclear signaling and coordination of protein levels between neighboring nuclei in Drosophila embryogenesis.
单细胞生物化学方法揭示了在细胞极化过程中PAR复杂的动力学。
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