Japan Agency for Medical Research and Development (AMED)
JP17am0101001
日本
Ministry of Education, Culture, Sports, Science and Technology (Japan)
JP19H05380
日本
Ministry of Education, Culture, Sports, Science and Technology (Japan)
JP18H05425
日本
Ministry of Education, Culture, Sports, Science and Technology (Japan)
JP18H05424
日本
引用
ジャーナル: Commun Biol / 年: 2023 タイトル: Six states of Enterococcus hirae V-type ATPase reveals non-uniform rotor rotation during turnover. 著者: Raymond N Burton-Smith / Chihong Song / Hiroshi Ueno / Takeshi Murata / Ryota Iino / Kazuyoshi Murata / 要旨: The vacuolar-type ATPase from Enterococcus hirae (EhV-ATPase) is a thus-far unique adaptation of V-ATPases, as it performs Na transport and demonstrates an off-axis rotor assembly. Recent single ...The vacuolar-type ATPase from Enterococcus hirae (EhV-ATPase) is a thus-far unique adaptation of V-ATPases, as it performs Na transport and demonstrates an off-axis rotor assembly. Recent single molecule studies of the isolated V domain have indicated that there are subpauses within the three major states of the pseudo three-fold symmetric rotary enzyme. However, there was no structural evidence for these. Herein we activate the EhV-ATPase complex with ATP and identified multiple structures consisting of a total of six states of this complex by using cryo-electron microscopy. The orientations of the rotor complex during turnover, especially in the intermediates, are not as perfectly uniform as expected. The densities in the nucleotide binding pockets in the V domain indicate the different catalytic conditions for the six conformations. The off-axis rotor and its' interactions with the stator a-subunit during rotation suggests that this non-uniform rotor rotation is performed through the entire complex.