Gene copy number and negative feedback differentially regulate transcriptional variability of segmentation clock genes.

Gene copy number and negative feedback differentially regulate transcriptional variability of segmentation clock genes.
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DOI:
10.1016/j.isci.2022.104579
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发表时间:
2022-07-15
期刊:
影响因子:
5.8
通讯作者:
Ozbudak, Ertugrul M.
Ozbudak, Ertugrul M.
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Zinani, Oriana Q. H.;Keseroglu, Kemal;Dey, Supravat;Ay, Ahmet;Singh, Abhyudai;Ozbudak, Ertugrul M.

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Timely progression of a genetic program is critical for embryonic development. However, gene expression involves inevitable fluctuations in biochemical reactions leading to substantial cell-to-cell variability (gene expression noise). One of the important questions in developmental biology is how pattern formation is reproducibly executed despite these unavoidable fluctuations in gene expression. Here, we studied the transcriptional variability of two paired zebrafish segmentation clock genes (her1 and her7) in multiple genetic backgrounds. Segmentation clock genes establish an oscillating self-regulatory system, presenting a challenging yet beautiful system in studying control of transcription variability. In this study, we found that a negative feedback loop established by the Her1 and Her7 proteins minimizes uncorrelated variability whereas gene copy number affects variability of both RNAs in a similar manner (correlated variability). We anticipate that these findings will help analyze the precision of other natural clocks and inspire the ideas for engineering precise synthetic clocks in tissue engineering. Cell volume variability causes correlated transcriptional variability of clock genes Her1/7 negative feedback loop suppresses uncorrelated transcriptional variability Gene dosage impacts correlated transcriptional variability of segmentation clock genes Biological sciences; Chronobiology; Developmental biology
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