5H7J

Crystal structure of Elongation factor 2

5H7J の概要

• エントリーDOI: 10.2210/pdb5h7j/pdb
• 関連するPDBエントリー: 5H7K 5H7L
• 分子名称: Elongation factor 2, PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER (3 entities in total)
• 機能のキーワード: elongation factor, protein biosynthesis, gtp-binding, translation
• 由来する生物種: Pyrococcus horikoshii OT3
• 細胞内の位置: Cytoplasm : O59521
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 168399.52

構造登録者

Tanzawa, T.,Kato, K.,Uchiumi, T.,Yao, M. (登録日: 2016-11-18, 公開日: 2018-02-21, 最終更新日: 2024-11-20)

主引用文献

Tanzawa, T.,Kato, K.,Girodat, D.,Ose, T.,Kumakura, Y.,Wieden, H.J.,Uchiumi, T.,Tanaka, I.,Yao, M.
The C-terminal helix of ribosomal P stalk recognizes a hydrophobic groove of elongation factor 2 in a novel fashion
Nucleic Acids Res., 46:3232-3244, 2018

PubMed Abstract: Archaea and eukaryotes have ribosomal P stalks composed of anchor protein P0 and aP1 homodimers (archaea) or P1•P2 heterodimers (eukaryotes). These P stalks recruit translational GTPases to the GTPase-associated center in ribosomes to provide energy during translation. The C-terminus of the P stalk is known to selectively recognize GTPases. Here we investigated the interaction between the P stalk and elongation factor 2 by determining the structures of Pyrococcus horikoshii EF-2 (PhoEF-2) in the Apo-form, GDP-form, GMPPCP-form (GTP-form), and GMPPCP-form bound with 11 C-terminal residues of P1 (P1C11). Helical structured P1C11 binds to a hydrophobic groove between domain G and subdomain G' of PhoEF-2, where is completely different from that of aEF-1α in terms of both position and sequence, implying that such interaction characteristic may be requested by how GTPases perform their functions on the ribosome. Combining PhoEF-2 P1-binding assays with a structural comparison of current PhoEF-2 structures and molecular dynamics model of a P1C11-bound GDP form, the conformational changes of the P1C11-binding groove in each form suggest that in response to the translation process, the groove has three states: closed, open, and release for recruiting and releasing GTPases.

PubMed: 29471537
DOI: 10.1093/nar/gky115

実験手法

X-RAY DIFFRACTION (2.3 Å)