ジャーナル: Nat Commun / 年: 2018 タイトル: Bacterial encapsulins as orthogonal compartments for mammalian cell engineering. 著者: Felix Sigmund / Christoph Massner / Philipp Erdmann / Anja Stelzl / Hannes Rolbieski / Mitul Desai / Sarah Bricault / Tobias P Wörner / Joost Snijder / Arie Geerlof / Helmut Fuchs / Martin ...著者: Felix Sigmund / Christoph Massner / Philipp Erdmann / Anja Stelzl / Hannes Rolbieski / Mitul Desai / Sarah Bricault / Tobias P Wörner / Joost Snijder / Arie Geerlof / Helmut Fuchs / Martin Hrabĕ de Angelis / Albert J R Heck / Alan Jasanoff / Vasilis Ntziachristos / Jürgen Plitzko / Gil G Westmeyer / 要旨: We genetically controlled compartmentalization in eukaryotic cells by heterologous expression of bacterial encapsulin shell and cargo proteins to engineer enclosed enzymatic reactions and size- ...We genetically controlled compartmentalization in eukaryotic cells by heterologous expression of bacterial encapsulin shell and cargo proteins to engineer enclosed enzymatic reactions and size-constrained metal biomineralization. The shell protein (EncA) from Myxococcus xanthus auto-assembles into nanocompartments inside mammalian cells to which sets of native (EncB,C,D) and engineered cargo proteins self-target enabling localized bimolecular fluorescence and enzyme complementation. Encapsulation of the enzyme tyrosinase leads to the confinement of toxic melanin production for robust detection via multispectral optoacoustic tomography (MSOT). Co-expression of ferritin-like native cargo (EncB,C) results in efficient iron sequestration producing substantial contrast by magnetic resonance imaging (MRI) and allowing for magnetic cell sorting. The monodisperse, spherical, and iron-loading nanoshells are also excellent genetically encoded reporters for electron microscopy (EM). In general, eukaryotically expressed encapsulins enable cellular engineering of spatially confined multicomponent processes with versatile applications in multiscale molecular imaging, as well as intriguing implications for metabolic engineering and cellular therapy.
凍結剤: ETHANE-PROPANE / チャンバー内湿度: 100 % / チャンバー内温度: 310 K / 装置: FEI VITROBOT MARK IV / 詳細: blot force: 10 blot time: 10.
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the sample was prepared by focused ion beam milling of vitrified HEK293T cells, which had been treated with ferrous iron sulfate and transferrin 72h before plunging