Biotechnology and Biological Sciences Research Council
BB/P008348/1
英国
Royal Society
RG170260
英国
Wellcome Trust
WT100387
英国
Medical Research Council (United Kingdom)
MC_UP_A025_1011
英国
Wellcome Trust
079605/Z/06/Z
英国
Biotechnology and Biological Sciences Research Council
BB/L014211/1
英国
引用
ジャーナル: Nat Struct Mol Biol / 年: 2019 タイトル: Structure of the dynein-2 complex and its assembly with intraflagellar transport trains. 著者: Katerina Toropova / Ruta Zalyte / Aakash G Mukhopadhyay / Miroslav Mladenov / Andrew P Carter / Anthony J Roberts / 要旨: Dynein-2 assembles with polymeric intraflagellar transport (IFT) trains to form a transport machinery that is crucial for cilia biogenesis and signaling. Here we recombinantly expressed the ~1.4-MDa ...Dynein-2 assembles with polymeric intraflagellar transport (IFT) trains to form a transport machinery that is crucial for cilia biogenesis and signaling. Here we recombinantly expressed the ~1.4-MDa human dynein-2 complex and solved its cryo-EM structure to near-atomic resolution. The two identical copies of the dynein-2 heavy chain are contorted into different conformations by a WDR60-WDR34 heterodimer and a block of two RB and six LC8 light chains. One heavy chain is steered into a zig-zag conformation, which matches the periodicity of the anterograde IFT-B train. Contacts between adjacent dyneins along the train indicate a cooperative mode of assembly. Removal of the WDR60-WDR34-light chain subcomplex renders dynein-2 monomeric and relieves autoinhibition of its motility. Our results converge on a model in which an unusual stoichiometry of non-motor subunits controls dynein-2 assembly, asymmetry, and activity, giving mechanistic insight into the interaction of dynein-2 with IFT trains and the origin of diverse functions in the dynein family.
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV
詳細
Dynein-2 complex; tail domain
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
特殊光学系
エネルギーフィルター - スリット幅: 20 eV
撮影
フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: COUNTING / 平均電子線量: 49.6 e/Å2 詳細: Average electron dose per image (e-/A2) for additional datasets was 46.8 and 45.4
詳細: EMD-3707 map was low pass filtered to 60A and used as a reference model for 3D classification and reconstruction of an initial, in-house collected cryo-EM dataset (Polara 300kV instrument). ...詳細: EMD-3707 map was low pass filtered to 60A and used as a reference model for 3D classification and reconstruction of an initial, in-house collected cryo-EM dataset (Polara 300kV instrument). This initial map was then used as a reference model for the dataset described in this entry.