- EMDB-9122: Flagellar motor averaged map from Borrelia burdorferi reveals the... -
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基本情報
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データベース: EMDB / ID: EMD-9122
タイトル
Flagellar motor averaged map from Borrelia burdorferi reveals the cytoplasmic ATPase complex
マップデータ
A recombined map of Borrelia burgdorferi flagellar motor (WT). The top part (collar and stators) and bottom part (C-ring and ATPase complex) have been processed separately.
試料
細胞器官・細胞要素: Borrelia burgdorferi flagellar motor averaged recombined averaged map. It shows 16-fold symmetry at collar and stators region, 23 spoke linkers, and 6-fold symmetry of the ATPase. The top part (collar and stators) and bottom part (C-ring and ATPase complex) were processed separatedly.
National Institutes of Health/National Institute Of Allergy and Infectious Diseases
R01AI087949
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases
R01DE023080
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases
R01AI078958
米国
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases
R01AR060834
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases
R21AI113014
米国
Welch Foundation
AU-1714
米国
引用
ジャーナル: PLoS Biol / 年: 2018 タイトル: Cryo-electron tomography of periplasmic flagella in Borrelia burgdorferi reveals a distinct cytoplasmic ATPase complex. 著者: Zhuan Qin / Jiagang Tu / Tao Lin / Steven J Norris / Chunhao Li / Md A Motaleb / Jun Liu / 要旨: Periplasmic flagella are essential for the distinct morphology and motility of spirochetes. A flagella-specific type III secretion system (fT3SS) composed of a membrane-bound export apparatus and a ...Periplasmic flagella are essential for the distinct morphology and motility of spirochetes. A flagella-specific type III secretion system (fT3SS) composed of a membrane-bound export apparatus and a cytosolic ATPase complex is responsible for the assembly of the periplasmic flagella. Here, we deployed cryo-electron tomography (cryo-ET) to visualize the fT3SS machine in the Lyme disease spirochete Borrelia burgdorferi. We show, for the first time, that the cytosolic ATPase complex is attached to the flagellar C-ring through multiple spokes to form the "spoke and hub" structure in B. burgdorferi. This structure not only strengthens structural rigidity of the round-shaped C-ring but also appears to rotate with the C-ring. Our studies provide structural insights into the unique mechanisms underlying assembly and rotation of the periplasmic flagella and may provide the basis for the development of novel therapeutic strategies against several pathogenic spirochetes.
ダウンロード / ファイル: emd_9122.map.gz / 形式: CCP4 / 大きさ: 30.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
A recombined map of Borrelia burgdorferi flagellar motor (WT). The top part (collar and stators) and bottom part (C-ring and ATPase complex) have been processed separately.
The original averaged map with a focus on the ATPase complex region. The map was not masked or filtered. The feature of the top part (collar and stators) was averaged out.
全体 : Borrelia burgdorferi flagellar motor averaged recombined averaged...
全体
名称: Borrelia burgdorferi flagellar motor averaged recombined averaged map. It shows 16-fold symmetry at collar and stators region, 23 spoke linkers, and 6-fold symmetry of the ATPase. The top ...名称: Borrelia burgdorferi flagellar motor averaged recombined averaged map. It shows 16-fold symmetry at collar and stators region, 23 spoke linkers, and 6-fold symmetry of the ATPase. The top part (collar and stators) and bottom part (C-ring and ATPase complex) were processed separatedly.
要素
細胞器官・細胞要素: Borrelia burgdorferi flagellar motor averaged recombined averaged map. It shows 16-fold symmetry at collar and stators region, 23 spoke linkers, and 6-fold symmetry of the ATPase. The top part (collar and stators) and bottom part (C-ring and ATPase complex) were processed separatedly.
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超分子 #1: Borrelia burgdorferi flagellar motor averaged recombined averaged...
超分子
名称: Borrelia burgdorferi flagellar motor averaged recombined averaged map. It shows 16-fold symmetry at collar and stators region, 23 spoke linkers, and 6-fold symmetry of the ATPase. The top ...名称: Borrelia burgdorferi flagellar motor averaged recombined averaged map. It shows 16-fold symmetry at collar and stators region, 23 spoke linkers, and 6-fold symmetry of the ATPase. The top part (collar and stators) and bottom part (C-ring and ATPase complex) were processed separatedly. タイプ: organelle_or_cellular_component / ID: 1 / 親要素: 0 詳細: Wild-type. Top part and bottom part have different symmetry, and were processed separately from the same group of sub-tomograms.
由来(天然)
生物種: Borrelia burgdorferi (バクテリア) / 株: B31 / Organelle: Flagellar motor / 細胞中の位置: cell tip
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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
サブトモグラム平均法
試料の集合状態
cell
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試料調製
緩衝液
pH: 7 詳細: BSK-II liquid medium supplemented with 6% rabbit serum
フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 100.0 e/Å2
電子線
加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN
電子光学系
照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD
実験機器
モデル: Tecnai Polara / 画像提供: FEI Company
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画像解析
最終 再構成
想定した対称性 - 点群: C1 (非対称) / 解像度のタイプ: BY AUTHOR / 解像度: 29.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF 詳細: It is combined from top map and bottom map. Top had 16-fold symmetry applied. The bottom map was asymmetric. 使用したサブトモグラム数: 4825