3次元ゲノム構造とクロマチン動態をつなぐ高分子物理学
Chromatin fibers, as the substance of the genome, are biopolymers packed inside eukaryotic cells. The recent development of Hi-C has provided insights into the hierarchical organization of chromosomes as 3D genome structures. These structures include A/B compartments at the megabase scale, TADs span...
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Published in | 日本薬理学会年会要旨集 p. 3-B-S48-3 |
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Main Authors | , |
Format | Journal Article |
Language | Japanese |
Published |
公益社団法人 日本薬理学会
2023
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Subjects | |
Online Access | Get full text |
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Summary: | Chromatin fibers, as the substance of the genome, are biopolymers packed inside eukaryotic cells. The recent development of Hi-C has provided insights into the hierarchical organization of chromosomes as 3D genome structures. These structures include A/B compartments at the megabase scale, TADs spanning hundreds of kilobases, and smaller contact/loop domains. However, Hi-C technology relies on the chemical fixation of cells and chromatin, limiting its ability to capture the dynamic nature of chromatin. In contrast, live-cell imaging experiments have demonstrated the dynamic nature of chromatin. To bridge the gap between the 3D genome structures and chromatin dynamics, we have developed a computational tool called PHi-C for interpreting Hi-C data as the dynamic 3D genome state in terms of polymer physics. PHi-C constructs a polymer model from an input Hi-C matrix. Analyzing a segment's dynamics reveals that it follows the generalized Langevin equation. Then, the segment's linear-response function relates to mean-square displacement. Thus, we established a theoretical approach to unveil the linear viscoelasticity of the 3D genome itself from Hi-C data or stochastic motion of a labeled locus. |
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Bibliography: | 97_3-B-S48-3 |
ISSN: | 2435-4953 |
DOI: | 10.1254/jpssuppl.97.0_3-B-S48-3 |