6N5I

FtsY-NG high-resolution

6N5I の概要

• エントリーDOI: 10.2210/pdb6n5i/pdb
• 分子名称: Signal recognition particle receptor FtsY, POTASSIUM ION, GLYCEROL, ... (4 entities in total)
• 機能のキーワード: ftsy, srp, signal recognition particle receptor, sr, transport protein
• 由来する生物種: Escherichia coli (strain K12)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 66411.47

構造登録者

Ataide, S.F.,Faoro, C. (登録日: 2018-11-21, 公開日: 2019-10-09, 最終更新日: 2024-03-13)

主引用文献

Faoro, C.,Ataide, S.F.
Structural insights into the G-loop dynamics of E. coli FtsY NG domain.
J.Struct.Biol., 208:107387-107387, 2019

PubMed Abstract: The bacterial signal recognition particle (SRP) receptor, FtsY, participates with the SRP in co-translation targeting of proteins. Multiple crystal structures of the NG domain of E. coli FtsY have been determined at high-resolution (1.22-1.88 Å), in the nucleotide-free (apo) form as well as bound to GDP and non-hydrolysable GTP analogues. The combination of high-resolution and multiple solved structures of FtsY in different states revealed a new sensor-relay system of this unique GTPase receptor. A nucleotide sensing function of the P-loop assists FtsY in nucleotide-binding and contributes to modulate nucleotide binding properties in SRP GTPases. A reorganization of the other G-loops and the insertion binding domain (IBD) is observed only upon transition from a diphosphate to a triphosphate nucleotide. The role of a magnesium ion during the GDP and GTP-bound states has also been observed. The binding of magnesium in the nucleotide site causes the reorientation of the β- and γ- phosphate groups toward the jaws of the P-loop and stabilizes the binding of the nucleotide, creating a network of hydrogen and water-bridge interactions.

PubMed: 31520694
DOI: 10.1016/j.jsb.2019.09.004

実験手法

X-RAY DIFFRACTION (1.498 Å)