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-Structure paper
| タイトル | The molecular basis of lamin-specific chromatin interactions. |
|---|---|
| ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 32, Issue 10, Page 1999-2011, Year 2025 |
| 掲載日 | 2025年8月1日 |
著者 | Baihui Wang / Rafael Kronenberg-Tenga / Valentina Rosti / Emanuele Di Patrizio Soldateschi / Qiang Luo / Ugo Maria Iannacchero / Louise Pinet / Matthias Eibauer / Rajaa Boujemaa-Paterski / Benjamin Schuler / Chiara Lanzuolo / Ohad Medalia / ![]() |
| PubMed 要旨 | In the cell nucleus, chromatin is anchored to the nuclear lamina, a network of lamin filaments and binding proteins that underly the inner nuclear membrane. The nuclear lamina is involved in ...In the cell nucleus, chromatin is anchored to the nuclear lamina, a network of lamin filaments and binding proteins that underly the inner nuclear membrane. The nuclear lamina is involved in chromatin organization through the interaction of lamina-associated domains within the densely packed heterochromatin regions. Using cryo-focused ion beam milling in conjunction with cryo-electron tomography, we analyzed the distribution of nucleosomes at the lamin-chromatin interface at the nanometer scale. Depletion of lamins A and C reduced nucleosome concentration at the nuclear periphery, while B-type lamin depletion contributed to nucleosome density in proximity to the lamina but not further away. We then investigated whether specific lamins can mediate direct interactions with chromatin. Using cryo-electron microscopy, we identified a specific binding motif of the lamin A tail domain that interacts with nucleosomes, distinguishing it from the other lamin isoforms. Furthermore, we examined chromatin structure dynamics using a genome-wide analysis that revealed lamin-dependent macroscopic-scale alterations in gene expression and chromatin remodeling. Our findings provide detailed insights into the dynamic and structural interplay between lamin isoforms and chromatin, molecular interactions that shape chromatin architecture and epigenetic regulation. |
リンク | Nat Struct Mol Biol / PubMed:40750945 / PubMed Central |
| 手法 | EM (トモグラフィー) / EM (単粒子) / EM (サブトモグラム平均) |
| 解像度 | 2.3 - 15.0 Å |
| 構造データ | ![]() EMDB-19827: Tomogram of nuclear envlope of WT mouse embryonic fibroblast ![]() EMDB-19828: Tomogram of nuclear envlope of LmnaKO mouse embryonic fibroblast ![]() EMDB-19829: Tomogram of nuclear envlope of LBDKO mouse embryonic fibroblast EMDB-50114, PDB-9f0o: ![]() EMDB-50291: The molecular basis and modulation of lamin-specific chromatin interactions ![]() EMDB-52630: MEF in-situ nucleosome consensus structure ![]() EMDB-52633: MEF in-situ nucleosome canonical structure |
| 由来 |
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キーワード | STRUCTURAL PROTEIN / nucleosome lamin A specific binding |
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