Dynamic changes in the interchromosomal interaction of early histone gene loci during early development of sea urchin

Journal of Cell Science
Masaya MatsushitaNaoaki Sakamoto

Abstract

The nuclear positioning and chromatin dynamics of eukaryotic genes are closely related to the regulation of gene expression, but they have not been well examined during early development, which is accompanied by rapid cell cycle progression and dynamic changes in nuclear organization, such as nuclear size and chromatin constitution. In this study, we focused on the early development of the sea urchin Hemicentrotus pulcherrimus and performed three-dimensional fluorescence in situ hybridization of early histone gene loci. There are two non-allelic early histone gene loci per sea urchin genome. We found that during the morula stage, when the early histone gene expression levels are at their maximum, interchromosomal interactions were often formed between the early histone gene loci on separate chromosomes and the gene loci were directed to locate to more interior positions. Furthermore, these interactions were associated with the active transcription of the early histone genes. Thus, such dynamic interchromosomal interactions may contribute to the efficient synthesis of early histone mRNA during early sea urchin development.

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Citations

Sep 6, 2018·The Journal of Cell Biology·Philipp G MaassJohn L Rinn
Mar 19, 2021·Frontiers in Genetics·Alessandro Bertero
Feb 24, 2018·Biochemistry·Dahyana Arias Escayola, Karla M Neugebauer

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