Biotechnology and Biological Sciences Research Council (BBSRC)
BB/M011178/1
英国
Medical Research Council (MRC, United Kingdom)
MR/V000799/1
英国
Human Frontier Science Program (HFSP)
RGP0028/2021-HOCHBERG
フランス
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R01AI065539
米国
Cancer Research UK
FC001143
英国
Medical Research Council (MRC, United Kingdom)
FC001143
英国
Wellcome Trust
FC001143
英国
引用
ジャーナル: bioRxiv / 年: 2024 タイトル: Molecular model of a bacterial flagellar motor reveals a "parts-list" of protein adaptations to increase torque. 著者: Tina Drobnič / Eli J Cohen / Tom Calcraft / Mona Alzheimer / Kathrin Froschauer / Sarah Svensson / William H Hoffmann / Nanki Singh / Sriram G Garg / Louie Henderson / Trishant R Umrekar / ...著者: Tina Drobnič / Eli J Cohen / Tom Calcraft / Mona Alzheimer / Kathrin Froschauer / Sarah Svensson / William H Hoffmann / Nanki Singh / Sriram G Garg / Louie Henderson / Trishant R Umrekar / Andrea Nans / Deborah Ribardo / Francesco Pedaci / Ashley L Nord / Georg K A Hochberg / David R Hendrixson / Cynthia M Sharma / Peter B Rosenthal / Morgan Beeby / 要旨: One hurdle to understanding how molecular machines work, and how they evolve, is our inability to see their structures . Here we describe a minicell system that enables cryogenic electron microscopy ...One hurdle to understanding how molecular machines work, and how they evolve, is our inability to see their structures . Here we describe a minicell system that enables cryogenic electron microscopy imaging and single particle analysis to investigate the structure of an iconic molecular machine, the bacterial flagellar motor, which spins a helical propeller for propulsion. We determine the structure of the high-torque motor including the subnanometre-resolution structure of the periplasmic scaffold, an adaptation essential to high torque. Our structure enables identification of new proteins, and interpretation with molecular models highlights origins of new components, reveals modifications of the conserved motor core, and explain how these structures both template a wider ring of motor proteins, and buttress the motor during swimming reversals. We also acquire insights into universal principles of flagellar torque generation. This approach is broadly applicable to other membrane-residing bacterial molecular machines complexes.
全体 : Periplasmic scaffold structures of the Campylobacter jejuni flage...
全体
名称: Periplasmic scaffold structures of the Campylobacter jejuni flagellar motor
要素
細胞器官・細胞要素: Periplasmic scaffold structures of the Campylobacter jejuni flagellar motor
複合体: Basal disk (part)
複合体: Periplasmic scaffold
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超分子 #1: Periplasmic scaffold structures of the Campylobacter jejuni flage...
超分子
名称: Periplasmic scaffold structures of the Campylobacter jejuni flagellar motor タイプ: organelle_or_cellular_component / ID: 1 / 親要素: 0
由来(天然)
生物種: Campylobacter jejuni (カンピロバクター) / 株: 81-176
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超分子 #2: Basal disk (part)
超分子
名称: Basal disk (part) / タイプ: complex / ID: 2 / 親要素: 1 詳細: Innermost ring of the basal disk, made of protein FlgP
由来(天然)
生物種: Campylobacter jejuni (カンピロバクター) / 株: 81-176
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超分子 #3: Periplasmic scaffold
超分子
名称: Periplasmic scaffold / タイプ: complex / ID: 3 / 親要素: 1 詳細: A protein scaffold in the C. jejuni motor incorporates stator complexes for flagellar motility
由来(天然)
生物種: Campylobacter jejuni (カンピロバクター) / 株: 81-176
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
単粒子再構成法
試料の集合状態
particle
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試料調製
緩衝液
pH: 7.4 / 詳細: PBS
グリッド
モデル: Quantifoil R0.6/1 / 材質: COPPER
凍結
凍結剤: ETHANE / チャンバー内湿度: 95 % / 装置: FEI VITROBOT MARK IV
詳細
Minicells purified by centrifugation and concentrated to theoretical OD600 ~10