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TitleStructural insights into flagellar stator-rotor interactions.
Journal, issue, pagesElife, Vol. 8, Year 2019
Publish dateJul 17, 2019
AuthorsYunjie Chang / Ki Hwan Moon / Xiaowei Zhao / Steven J Norris / Md A Motaleb / Jun Liu /
PubMed AbstractThe bacterial flagellar motor is a molecular machine that can rotate the flagellar filament at high speed. The rotation is generated by the stator-rotor interaction, coupled with an ion flux through ...The bacterial flagellar motor is a molecular machine that can rotate the flagellar filament at high speed. The rotation is generated by the stator-rotor interaction, coupled with an ion flux through the torque-generating stator. Here we employed cryo-electron tomography to visualize the intact flagellar motor in the Lyme disease spirochete, . By analyzing the motor structures of wild-type and stator-deletion mutants, we not only localized the stator complex in situ, but also revealed the stator-rotor interaction at an unprecedented detail. Importantly, the stator-rotor interaction induces a conformational change in the flagella C-ring. Given our observation that a non-motile mutant, in which proton flux is blocked, cannot generate the similar conformational change, we propose that the proton-driven torque is responsible for the conformational change required for flagellar rotation.
External linksElife / PubMed:31313986 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution20.0 - 34.0 Å
Structure data

EMDB-0534:
Asymmetric reconstruction of the in situ flagellar motor structure in Borrelia burgdorferi
Method: EM (subtomogram averaging) / Resolution: 29.0 Å

EMDB-0536:
Local refinement of stator-rotor interaction region in flagellar motor of wild type Borrelia burgdorferi
Method: EM (subtomogram averaging) / Resolution: 20.0 Å

EMDB-0537:
cryo-ET flagellar motor structure of motB deletion Borrelia burgdorferi
Method: EM (subtomogram averaging) / Resolution: 34.0 Å

EMDB-0538:
Local refinement for the in-situ flagellar motor structure of motB deletion Borrelia burgdorferi
Method: EM (subtomogram averaging) / Resolution: 30.0 Å

Source
  • Borreliella burgdorferi (Lyme disease spirochete)

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