National Natural Science Foundation of China (NSFC)
32371191
中国
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: In situ cryo-electron tomography reveals the progressive biogenesis of basal bodies and cilia in mouse ependymal cells. 著者: Shanshan Ma / Luan Li / Zhixun Li / Shenjia Luo / Qi Liu / Wenjing Du / Benhua Qiu / Miao Gui / Xueliang Zhu / Qiang Guo / 要旨: Cilia, essential organelles for cell motility and signaling, comprise an axoneme extended from the basal body (BB). The assembly process of BBs and axonemes during ciliogenesis, however, remains ...Cilia, essential organelles for cell motility and signaling, comprise an axoneme extended from the basal body (BB). The assembly process of BBs and axonemes during ciliogenesis, however, remains largely unknown due to the lack of structural information. Here, we leverage in-situ cryo-electron tomography to capture within mouse ependymal cells the dynamic processes of BB biogenesis and multiciliogenesis at various stages. This approach enables 3D visualization of the complete motile machinery, revealing the continuous microtubule-based scaffold from BBs to axonemes at sub-nanometer resolution with unprecedented structural details. Furthermore, we elucidate along BBs and cilia heterogeneous landscapes of microtubule-binding proteins underlying the establishment of structural periodicity and diverse subregions. Notably, the chronological binding patterns of microtubule-inner proteins (e.g., CEP41) correlate with the progressive assembly of ciliary beating machinery. We also resolve a substructure that borders the BB and the axoneme. Our findings provide key insights into intricate orchestrations during ciliogenesis.
集束イオンビーム - 装置: OTHER / 集束イオンビーム - イオン: OTHER / 集束イオンビーム - 電圧: 30 / 集束イオンビーム - 電流: 0.03 / 集束イオンビーム - 時間: 1800 / 集束イオンビーム - 温度: 77 K / 集束イオンビーム - Initial thickness: 1000 / 集束イオンビーム - 最終 厚さ: 190 集束イオンビーム - 詳細: The value given for _em_focused_ion_beam.instrument is Aquilos 2. This is not in a list of allowed values {'OTHER', 'DB235'} so OTHER is written into the XML file.
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電子顕微鏡法
顕微鏡
TFS KRIOS
撮影
フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 1.8 e/Å2