論文 - 詳細
| RRC ID | 69010 |
|---|---|
| 著者 | Ishihara S, Sasagawa Y, Kameda T, Yamashita H, Umeda M, Kotomura N, Abe M, Shimono Y, Nikaido I. |
| タイトル | Local states of chromatin compaction at transcription start sites control transcription levels. |
| ジャーナル | Nucleic Acids Res |
| Abstract |
The 'open' and 'compact' regions of chromatin are considered to be regions of active and silent transcription, respectively. However, individual genes produce transcripts at different levels, suggesting that transcription output does not depend on the simple open-compact conversion of chromatin, but on structural variations in chromatin itself, which so far have remained elusive. In this study, weakly crosslinked chromatin was subjected to sedimentation velocity centrifugation, which fractionated the chromatin according to its degree of compaction. Open chromatin remained in upper fractions, while compact chromatin sedimented to lower fractions depending on the level of nucleosome assembly. Although nucleosomes were evenly detected in all fractions, histone H1 was more highly enriched in the lower fractions. H1 was found to self-associate and crosslinked to histone H3, suggesting that H1 bound to H3 interacts with another H1 in an adjacent nucleosome to form compact chromatin. Genome-wide analyses revealed that nearly the entire genome consists of compact chromatin without differences in compaction between repeat and non-repeat sequences; however, active transcription start sites (TSSs) were rarely found in compact chromatin. Considering the inverse correlation between chromatin compaction and RNA polymerase binding at TSSs, it appears that local states of chromatin compaction determine transcription levels. |
| 巻・号 | 49(14) |
| ページ | 8007-8023 |
| 公開日 | 2021-8-20 |
| DOI | 10.1093/nar/gkab587 |
| PII | 6316832 |
| PMID | 34233004 |
| PMC | PMC8373074 |
| MeSH | Centrifugation Chromatin / genetics Chromatin / ultrastructure* Chromatin Assembly and Disassembly / genetics Genome, Human / genetics Histones / genetics Humans Nucleosomes / genetics* Nucleosomes / ultrastructure Protein Binding / genetics Transcription Factors / genetics Transcription Initiation Site* Transcription, Genetic* |
| IF | 11.502 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
|
| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 26 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| ヒト・動物細胞 | Hep G2 |