2025
FlgY, PflA, and PflB form a spoke–ring network in the high-torque flagellar motor of Helicobacter pylori
Tachiyama S, Rosinke K, Khan M, Zhou X, Xin Y, Botting J, Yue J, Roujeinikova A, Hoover T, Liu J. FlgY, PflA, and PflB form a spoke–ring network in the high-torque flagellar motor of Helicobacter pylori. Proceedings Of The National Academy Of Sciences Of The United States Of America 2025, 122: e2421632122. PMID: 40261933, PMCID: PMC12054838, DOI: 10.1073/pnas.2421632122.Peer-Reviewed Original ResearchConceptsMS ringAccessory proteinsStator complexWild-type <i>H. pyFlagellar motorSalmonella enterica</i>Protein-protein interactionsFlagellar motilityAlphaFold-predicted structuresFlgIBiochemical approachesPflBGastric mucus layerMolecular geneticsPFLACryoelectron tomographyUnique motilityBacterial flagellar motorMucus layerMotilityBacteriaProteinHuman stomachPseudoatomic modelHelicobacter pylori
2022
The Bacterial Flagellar Motor: Insights Into Torque Generation, Rotational Switching, and Mechanosensing
Guo S, Liu J. The Bacterial Flagellar Motor: Insights Into Torque Generation, Rotational Switching, and Mechanosensing. Frontiers In Microbiology 2022, 13: 911114. PMID: 35711788, PMCID: PMC9195833, DOI: 10.3389/fmicb.2022.911114.Peer-Reviewed Original ResearchStator complexStator unitsFlagellar motorStructural biology perspectiveBacterial flagellar motorRotary nanomachineBiology perspectiveAccessory proteinsStructural insightsBacterial motilitySpecific nichesMechanistic basisHost cellsDistinct conformationsC-ringRotational switchingBacteriaAccessory moleculesMotilityFliLMechanosensingComplexesNicheStructural remodelingCytoplasm
2020
The flagellar motor of Vibrio alginolyticus undergoes major structural remodeling during rotational switching
Carroll BL, Nishikino T, Guo W, Zhu S, Kojima S, Homma M, Liu J. The flagellar motor of Vibrio alginolyticus undergoes major structural remodeling during rotational switching. ELife 2020, 9: e61446. PMID: 32893817, PMCID: PMC7505661, DOI: 10.7554/elife.61446.Peer-Reviewed Original ResearchConceptsFlagellar motorRotational switchingBacterial flagellar motorLarge conformational rearrangementsCryo-electron tomographyMajor structural remodelingConformational remodelingRotor complexCytoplasmic ringConformational rearrangementsProtein compositionConformational changesC-ringNovel insightsFliNFlagellaMolecular architectureFLIMVibrioFliGRemodelingMutantsStructural remodelingMechanismCellsMolecular mechanism for rotational switching of the bacterial flagellar motor
Chang Y, Zhang K, Carroll BL, Zhao X, Charon NW, Norris SJ, Motaleb MA, Li C, Liu J. Molecular mechanism for rotational switching of the bacterial flagellar motor. Nature Structural & Molecular Biology 2020, 27: 1041-1047. PMID: 32895555, PMCID: PMC8129871, DOI: 10.1038/s41594-020-0497-2.Peer-Reviewed Original ResearchConceptsBacterial flagellar motorSwitch proteinFlagellar motorResponse regulator CheYRotational switchingProton motive forceSwitch complexMolecular mechanismsPhosphorylated formMajor remodelingConformational changesMotive forceModel systemProteinBorrelia burgdorferiCheY3CheYMutantsTorque generatorFLIMInteractsCheXCW rotationMechanismRemodelingIn Situ Structure of the Vibrio Polar Flagellum Reveals a Distinct Outer Membrane Complex and Its Specific Interaction with the Stator
Zhu S, Nishikino T, Takekawa N, Terashima H, Kojima S, Imada K, Homma M, Liu J. In Situ Structure of the Vibrio Polar Flagellum Reveals a Distinct Outer Membrane Complex and Its Specific Interaction with the Stator. Journal Of Bacteriology 2020, 202: 10.1128/jb.00592-19. PMID: 31767780, PMCID: PMC6989802, DOI: 10.1128/jb.00592-19.Peer-Reviewed Original ResearchConceptsProtein-protein interactionsCryo-electron tomographyStator unitsFlagellar rotationDetailed protein-protein interactionsUnique protein-protein interactionsGram-negative marine bacteriumPolar sheathed flagellumBasal body structureHigh-speed motilityBacterial flagellar motorLarge conformational changesSpecific interactionsFirst structural evidencePeriplasmic domainPolar flagellumFlagellar motorPeptidoglycan layerMembrane complexT ringMarine bacteriumBacterial flagellaGenetic analysisDetailed structural informationSheathed flagellum
2017
In Situ Structural Analysis of the Spirochetal Flagellar Motor by Cryo-Electron Tomography
Zhu S, Qin Z, Wang J, Morado DR, Liu J. In Situ Structural Analysis of the Spirochetal Flagellar Motor by Cryo-Electron Tomography. Methods In Molecular Biology 2017, 1593: 229-242. PMID: 28389958, DOI: 10.1007/978-1-4939-6927-2_18.Peer-Reviewed Original ResearchConceptsCryo-electron tomographyFlagellar motorIntact flagellar motorBacterial flagellar motorMolecular machinerySitu structural analysisExtensive structural analysisMolecular machinesLarge complexesStructural analysisUnprecedented detailBorrelia burgdorferiStructural determinationMachineryOrganismsBacteriaPowerful techniqueCellsComplexesBurgdorferi
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