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Pairing of segmentation clock genes drives robust pattern formation

Oriana Q. H. Zinani, Kemal Keseroğlu, Ahmet Ay and Ertuğrul M. Özbudak ()
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Oriana Q. H. Zinani: University of Cincinnati College of Medicine
Kemal Keseroğlu: Cincinnati Children’s Hospital Medical Center
Ahmet Ay: Colgate University
Ertuğrul M. Özbudak: University of Cincinnati College of Medicine

Nature, 2021, vol. 589, issue 7842, 431-436

Abstract: Abstract Gene expression is an inherently stochastic process1,2; however, organismal development and homeostasis require cells to coordinate the spatiotemporal expression of large sets of genes. In metazoans, pairs of co-expressed genes often reside in the same chromosomal neighbourhood, with gene pairs representing 10 to 50% of all genes, depending on the species3–6. Because shared upstream regulators can ensure correlated gene expression, the selective advantage of maintaining adjacent gene pairs remains unknown6. Here, using two linked zebrafish segmentation clock genes, her1 and her7, and combining single-cell transcript counting, genetic engineering, real-time imaging and computational modelling, we show that gene pairing boosts correlated transcription and provides phenotypic robustness for the formation of developmental patterns. Our results demonstrate that the prevention of gene pairing disrupts oscillations and segmentation, and the linkage of her1 and her7 is essential for the development of the body axis in zebrafish embryos. We predict that gene pairing may be similarly advantageous in other organisms, and our findings could lead to the engineering of precise synthetic clocks in embryos and organoids.

Date: 2021
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DOI: 10.1038/s41586-020-03055-0

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