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-Structure paper
| タイトル | Structure of the activated human minor spliceosome. |
|---|---|
| ジャーナル・号・ページ | Science, Vol. 371, Issue 6535, Year 2021 |
| 掲載日 | 2021年3月19日 |
著者 | Rui Bai / Ruixue Wan / Lin Wang / Kui Xu / Qiangfeng Zhang / Jianlin Lei / Yigong Shi / ![]() |
| PubMed 要旨 | The minor spliceosome mediates splicing of the rare but essential U12-type precursor messenger RNA. Here, we report the atomic features of the activated human minor spliceosome determined by cryo- ...The minor spliceosome mediates splicing of the rare but essential U12-type precursor messenger RNA. Here, we report the atomic features of the activated human minor spliceosome determined by cryo-electron microscopy at 2.9-angstrom resolution. The 5' splice site and branch point sequence of the U12-type intron are recognized by the U6atac and U12 small nuclear RNAs (snRNAs), respectively. Five newly identified proteins stabilize the conformation of the catalytic center: The zinc finger protein SCNM1 functionally mimics the SF3a complex of the major spliceosome, the RBM48-ARMC7 complex binds the γ-monomethyl phosphate cap at the 5' end of U6atac snRNA, the U-box protein PPIL2 coordinates loop I of U5 snRNA and stabilizes U5 small nuclear ribonucleoprotein (snRNP), and CRIPT stabilizes U12 snRNP. Our study provides a framework for the mechanistic understanding of the function of the human minor spliceosome. |
リンク | Science / PubMed:33509932 |
| 手法 | EM (単粒子) |
| 解像度 | 2.89 - 3.24 Å |
| 構造データ | EMDB-30875, PDB-7dvq: ![]() EMDB-30878: ![]() EMDB-30879: |
| 化合物 | ![]() ChemComp-IHP: ![]() ChemComp-GTP: ![]() ChemComp-MG: ![]() ChemComp-K: ![]() ChemComp-G5J: ![]() ChemComp-ZN: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | SPLICING / spliceosome / minor spliceosome / Bact complex / human spliceosome / PPIL2 / SCNM1 / RBM48-ARMC7 complex / U12-type intron / U6atac snRNA |
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homo sapiens (ヒト)
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