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Greenwald, William W; Li, He; Benaglio, Paola; Jakubosky, David; Matsui, Hiroko; Schmitt, Anthony; Selvaraj, Siddarth; D'Antonio, Matteo; D'Antonio-Chronowska, Agnieszka; Smith, Erin N; Frazer, Kelly A
Nature communications, 03/2019, Letnik: 10, Številka: 1Journal Article
While genetic variation at chromatin loops is relevant for human disease, the relationships between contact propensity (the probability that loci at loops physically interact), genetics, and gene regulation are unclear. We quantitatively interrogate these relationships by comparing Hi-C and molecular phenotype data across cell types and haplotypes. While chromatin loops consistently form across different cell types, they have subtle quantitative differences in contact frequency that are associated with larger changes in gene expression and H3K27ac. For the vast majority of loci with quantitative differences in contact frequency across haplotypes, the changes in magnitude are smaller than those across cell types; however, the proportional relationships between contact propensity, gene expression, and H3K27ac are consistent. These findings suggest that subtle changes in contact propensity have a biologically meaningful role in gene regulation and could be a mechanism by which regulatory genetic variants in loop anchors mediate effects on expression.
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