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-Structure paper
| タイトル | Cancer-associated DNA hypermethylation of Polycomb targets requires DNMT3A dual recognition of histone H2AK119 ubiquitination and the nucleosome acidic patch. |
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| ジャーナル・号・ページ | Sci Adv, Vol. 10, Issue 35, Page eadp0975, Year 2024 |
| 掲載日 | 2024年8月30日 |
著者 | Kristjan H Gretarsson / Stephen Abini-Agbomson / Susan L Gloor / Daniel N Weinberg / Jamie L McCuiston / Vishnu Udayakumar Sunitha Kumary / Allison R Hickman / Varun Sahu / Rachel Lee / Xinjing Xu / Natalie Lytell / Samuel Flashner / Oluwatobi A Adeleke / Irina K Popova / Hailey F Taylor / Kelsey Noll / Carolina Lin Windham / Danielle N Maryanski / Bryan J Venters / Hiroshi Nakagawa / Michael-Christopher Keogh / Karim-Jean Armache / Chao Lu / ![]() |
| PubMed 要旨 | During tumor development, promoter CpG islands that are normally silenced by Polycomb repressive complexes (PRCs) become DNA-hypermethylated. The molecular mechanism by which de novo DNA ...During tumor development, promoter CpG islands that are normally silenced by Polycomb repressive complexes (PRCs) become DNA-hypermethylated. The molecular mechanism by which de novo DNA methyltransferase(s) [DNMT(s)] catalyze CpG methylation at PRC-regulated regions remains unclear. Here, we report a cryo-electron microscopy structure of the DNMT3A long isoform (DNMT3A1) amino-terminal region in complex with a nucleosome carrying PRC1-mediated histone H2A lysine-119 monoubiquitination (H2AK119Ub). We identify regions within the DNMT3A1 amino terminus that bind H2AK119Ub and the nucleosome acidic patch. This bidentate interaction is required for effective DNMT3A1 engagement with H2AK119Ub-modified chromatin in cells. Further, aberrant redistribution of DNMT3A1 to Polycomb target genes recapitulates the cancer-associated DNA hypermethylation signature and inhibits their transcriptional activation during cell differentiation. This effect is rescued by disruption of the DNMT3A1-acidic patch interaction. Together, our analyses reveal a binding interface critical for mediating promoter CpG island DNA hypermethylation, a major molecular hallmark of cancer. |
リンク | Sci Adv / PubMed:39196936 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.88 Å |
| 構造データ | EMDB-42636, PDB-8uw1: |
| 由来 |
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キーワード | GENE REGULATION / DNMT3A1 / Chromatin / H2A lysine 119 monoubiquitination / DNA Methyltransferase |
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