5YU7

CRYSTAL STRUCTURE OF EXPORTIN-5

5YU7 の概要

• エントリーDOI: 10.2210/pdb5yu7/pdb
• 分子名称: Exportin-5 (1 entity in total)
• 機能のキーワード: rna binding protein
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 136454.72

構造登録者

Yamazawa, R.,Jiko, C.,Lee, S.J.,Yamashita, E. (登録日: 2017-11-20, 公開日: 2018-08-29, 最終更新日: 2023-11-22)

主引用文献

Yamazawa, R.,Jiko, C.,Choi, S.,Park, I.Y.,Nakagawa, A.,Yamashita, E.,Lee, S.J.
Structural Basis for Selective Binding of Export Cargoes by Exportin-5
Structure, 26:1393-1398.e2, 2018

PubMed Abstract: In the nucleus, RanGTP binding to importin dissociates the cargo. On the other hand, RanGTP enables exportin to bind export cargo and form the export complex by each exportin's own cargo selection mechanism. Here, we present two X-ray structures for Exportin-5 (Exp-5) alone and Exp-5:RanGTP intermediate complex. The structure of Exp-5 adopts a ring-shaped closed conformation by C-terminal anchor residues 1,167-1,179, interacting with N-terminal heat repeats 4-9. The closed form of Exp-5 is important for the stability of the cargo-free state. Interaction between Exp-5 and RanGTP induces elimination of intramolecular contacts of the C-terminal anchor. A large movement of N-terminal 1-9th heat repeats and C-terminal 19-20th heat repeats creates an open space for RanGTP accommodation. Exp-5 in Exp-5:RanGTP and Exp-5:RanGTP:pre-miRNA adopts the same conformation. RanGTP binding to Exp-5 creates a selective molecular cage area for accepting its cargoes, such as small double-stranded RNAs, without conformational change in Exp-5:RanGTP.

PubMed: 30100359
DOI: 10.1016/j.str.2018.06.014

実験手法

X-RAY DIFFRACTION (3.301 Å)