ジャーナル: Structure / 年: 2026 タイトル: A correlative workflow for synaptic imaging by cryo-electron tomography. 著者: Thanh Thao Do / Anna Siegert / Florelle Domart / Fabienne Hahn / Christina Zeising / Sarah Muth / Constantin Pape / Kathrin Kusch / Thomas Dresbach / Silvio O Rizzoli / Arsen Petrovic / ...著者: Thanh Thao Do / Anna Siegert / Florelle Domart / Fabienne Hahn / Christina Zeising / Sarah Muth / Constantin Pape / Kathrin Kusch / Thomas Dresbach / Silvio O Rizzoli / Arsen Petrovic / Rubén Fernández-Busnadiego / 要旨: Despite decades of intense research, the molecular organization of the synapse is not well understood. To address this issue, we sought to develop a method for systematic imaging of synapses by cryo- ...Despite decades of intense research, the molecular organization of the synapse is not well understood. To address this issue, we sought to develop a method for systematic imaging of synapses by cryo-electron tomography (cryo-ET), a technology capable of mapping cellular architecture at molecular resolution. Thinning of cellular samples by cryo-focused ion beam milling is a prerequisite for high-quality cryo-ET imaging, but this process needs to be guided to the structures of interest. To allow synaptic targeting, we established a correlative cryo-light/electron microscopy approach by which synapses are fluorescently labeled in a minimally invasive manner, using a synthetic binder of the postsynaptic scaffold PSD-95 and antibodies against the presynaptic protein synaptotagmin-1. Cryo-ET imaging at sites of colocalization predominantly revealed excitatory synapses. Our method allows structural studies of synapse-resident protein complexes in situ, facilitating investigations of the molecular architecture of synapses.
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: 0.05 / 集束イオンビーム - 時間: 3600 / 集束イオンビーム - 温度: 83 K / 集束イオンビーム - Initial thickness: 5000 / 集束イオンビーム - 最終 厚さ: 150 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.