書誌事項
- タイトル別名
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- Irregular Folding of Human Genome DNA in the Cells
- ヒトゲノム DNA ノ フキソク デ ジュウナン ナ シュウノウ ゲンリ
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抄録
How is 2-m-long genomic DNA organized into a mitotic chromosome or nucleus? The nucleosome fiber has long been assumed to be folded into a 30-nm chromatin fiber, and further helically folded larger fiber. However, when we observed frozen hydrated human mitotic cells using cryoelectron microscopy (cryo-EM), no higher-order structures including 30-nm chromatin fibers were found. To further investigate the bulk structure of mitotic chromosomes, we performed small-angle X-ray scattering (SAXS) at SPring-8. No structural feature larger than 11 nm was detected, even on a chromosome-diameter scale (~1 μm). We also found a similar scattering pattern in interphase nuclei of HeLa cells in the range up to ~275 nm. Our findings suggest a common structural feature in interphase and mitotic chromatins: compact and irregular folding of nucleosome fibers occurs without a 30-nm chromatin structure.<br>
収録刊行物
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- 生物物理
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生物物理 53 (1), 004-010, 2013
一般社団法人 日本生物物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282681510962944
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- NII論文ID
- 10031139018
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- NII書誌ID
- AN00129693
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- COI
- 1:CAS:528:DC%2BC3sXisVWntr0%3D
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- ISSN
- 13474219
- 05824052
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- NDL書誌ID
- 024274438
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可