+検索条件
-Structure paper
| タイトル | Molecular basis for the recognition of the human AAUAAA polyadenylation signal. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 115, Issue 7, Page E1419-E1428, Year 2018 |
| 掲載日 | 2018年2月13日 |
著者 | Yadong Sun / Yixiao Zhang / Keith Hamilton / James L Manley / Yongsheng Shi / Thomas Walz / Liang Tong / ![]() |
| PubMed 要旨 | Nearly all eukaryotic messenger RNA precursors must undergo cleavage and polyadenylation at their 3'-end for maturation. A crucial step in this process is the recognition of the AAUAAA ...Nearly all eukaryotic messenger RNA precursors must undergo cleavage and polyadenylation at their 3'-end for maturation. A crucial step in this process is the recognition of the AAUAAA polyadenylation signal (PAS), and the molecular mechanism of this recognition has been a long-standing problem. Here, we report the cryo-electron microscopy structure of a quaternary complex of human CPSF-160, WDR33, CPSF-30, and an AAUAAA RNA at 3.4-Å resolution. Strikingly, the AAUAAA PAS assumes an unusual conformation that allows this short motif to be bound directly by both CPSF-30 and WDR33. The A1 and A2 bases are recognized specifically by zinc finger 2 (ZF2) of CPSF-30 and the A4 and A5 bases by ZF3. Interestingly, the U3 and A6 bases form an intramolecular Hoogsteen base pair and directly contact WDR33. CPSF-160 functions as an essential scaffold and preorganizes CPSF-30 and WDR33 for high-affinity binding to AAUAAA. Our findings provide an elegant molecular explanation for how PAS sequences are recognized for mRNA 3'-end formation. |
リンク | Proc Natl Acad Sci U S A / PubMed:29208711 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.36 - 3.8 Å |
| 構造データ | EMDB-7112, PDB-6dnh: |
| 化合物 | ![]() ChemComp-ZN: |
| 由来 |
|
キーワード | PROTEIN BINDING / polyadenylation / scaffolding protein / WD40 / RNA BINDING PROTEIN/RNA / Recognition of the AAUAAA polyadenylation signal (PAS) / Hoogsteen base pair / zinc finger / RNA BINDING PROTEIN-RNA complex |
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク






homo sapiens (ヒト)
simian virus 40 (ウイルス)
キーワード