Anopheles mosquitoes reveal new principles of 3D genome organization in insects

Varvara Lukyanchikova, Miroslav Nuriddinov, Polina Belokopytova, Alena Taskina, Jiangtao Liang, Maarten J.M.F. Reijnders, Livio Ruzzante, Romain Feron, Robert M. Waterhouse, Yang Wu, Chunhong Mao, Zhijian Tu, Igor V. Sharakhov, Veniamin Fishman

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование


Chromosomes are hierarchically folded within cell nuclei into territories, domains and subdomains, but the functional importance and evolutionary dynamics of these hierarchies are poorly defined. Here, we comprehensively profile genome organizations of five Anopheles mosquito species and show how different levels of chromatin architecture influence each other. Patterns observed on Hi-C maps are associated with known cytological structures, epigenetic profiles, and gene expression levels. Evolutionary analysis reveals conservation of chromatin architecture within synteny blocks for tens of millions of years and enrichment of synteny breakpoints in regions with increased genomic insulation. However, in-depth analysis shows a confounding effect of gene density on both insulation and distribution of synteny breakpoints, suggesting limited causal relationship between breakpoints and regions with increased genomic insulation. At the level of individual loci, we identify specific, extremely long-ranged looping interactions, conserved for ~100 million years. We demonstrate that the mechanisms underlying these looping contacts differ from previously described Polycomb-dependent interactions and clustering of active chromatin.

Язык оригиналаанглийский
Номер статьи1960
ЖурналNature Communications
Номер выпуска1
СостояниеОпубликовано - дек. 2022

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