5ZFQ

Crystal structure of PilT-4, a retraction ATPase motor of Type IV pilus , from Geobacter sulfurreducens

5ZFQ の概要

• エントリーDOI: 10.2210/pdb5zfq/pdb
• 分子名称: Twitching motility pilus retraction protein (2 entities in total)
• 機能のキーワード: type iv pilus, retraction atpase, pilt-4, transport protein
• 由来する生物種: Geobacter sulfurreducens PCA
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 87190.07

構造登録者

Thakur, K.G.,Kapoor, S.,Solanki, V. (登録日: 2018-03-06, 公開日: 2018-09-19, 最終更新日: 2023-11-22)

主引用文献

Solanki, V.,Kapoor, S.,Thakur, K.G.
Structural insights into the mechanism of Type IVa pilus extension and retraction ATPase motors
FEBS J., 285:3402-3421, 2018

PubMed Abstract: Type IVa pili are bacterial appendages involved in diverse physiological processes, including electron transfer in Geobacter sulfurreducens. ATP hydrolysis coupled with conformational changes powers the extension (PilB) and retraction (PilT) motors in the pilus machinery. We report the unliganded crystal structures of the core ATPase domain of PilB and PilT-4 from G. sulfurreducens at 3.1 and 2.6 Å resolution, respectively. PilB structure revealed three distinct conformations, that is, open, closed, and open' which were previously proposed to be mediated by ATP/ADP binding. PilT-4 subunits, on the other hand, were observed in the closed state conformation. We further report that both PilB and PilT-4 hexamers have two high-affinity ATP-binding sites. Comparative structural analysis and solution data presented here supports the "symmetric rotary model" for these ATPase motors. Our data further suggest that pores of these motors rotate either clockwise or counterclockwise to facilitate assembly or disassembly of right-handed or left-handed pilus.

PubMed: 30066435
DOI: 10.1111/febs.14619

実験手法

X-RAY DIFFRACTION (2.6 Å)