+検索条件
-Structure paper
| タイトル | Structural mechanism of DDX39B regulation by human TREX-2 and a related complex in mRNP remodeling. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 5471, Year 2025 |
| 掲載日 | 2025年7月1日 |
著者 | Bradley P Clarke / Shengyan Gao / Menghan Mei / Dongqi Xie / Alexia E Angelos / Ashley Vazhavilla / Pate S Hill / Tolga Cagatay / Kimberly Batten / Jerry W Shay / Yihu Xie / Beatriz M A Fontoura / Yi Ren / ![]() |
| PubMed 要旨 | Nuclear export of mRNAs in the form of messenger ribonucleoprotein particles (mRNPs) is an obligatory step for eukaryotic gene expression. The DEAD-box ATPase DDX39B (also known as UAP56) is a ...Nuclear export of mRNAs in the form of messenger ribonucleoprotein particles (mRNPs) is an obligatory step for eukaryotic gene expression. The DEAD-box ATPase DDX39B (also known as UAP56) is a multifunctional regulator of nuclear mRNPs. How DDX39B mediates mRNP assembly and export in a controlled manner remains elusive. Here, we identify a novel complex TREX-2.1 localized in the nucleus that facilitates the release of DDX39B from the mRNP. TREX-2.1 is composed of three subunits, LENG8, PCID2, and DSS1, and shares the latter two subunits with the nuclear pore complex-associated TREX-2 complex. Cryo-EM structures of TREX-2.1/DDX39B and TREX-2/DDX39B identify a conserved trigger loop in the LENG8 and GANP subunit of the respective TREX-2.1 and TREX-2 complex that is critical for DDX39B regulation. RNA sequencing from LENG8 knockdown cells shows that LENG8 influences the nucleocytoplasmic ratio of a subset of mRNAs with high GC content. Together, our findings lead to a mechanistic understanding of the functional cycle of DDX39B and its regulation by TREX-2 and TREX-2.1 in mRNP processing. |
リンク | Nat Commun / PubMed:40595470 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.79 - 3.28 Å |
| 構造データ | ![]() EMDB-46981: Cryo-EM map of human TREX-2 complex bound to full-length DDX39B EMDB-46982, PDB-9dlp: EMDB-46983, PDB-9dlr: EMDB-46985, PDB-9dlv: ![]() EMDB-47126: Cryo-EM map of the human TREX-2.1 complex bound to DDX39B(UAP56) |
| 化合物 | ![]() ChemComp-ADP: ![]() ChemComp-MG: |
| 由来 |
|
キーワード | RNA BINDING PROTEIN / mRNA nuclear export / TREX / TREX-2 / UAP56 / DDX39B / RNA BINDING PROTEIN/Hydrolase / LENG8 / RNA BINDING PROTEIN-Hydrolase 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)
キーワード