Controlled bacterial lysis for electron tomography of native cell membranes.
Controlled bacterial lysis for electron tomography of native cell membranes.
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DOI:
10.1016/j.str.2014.09.017
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发表时间:
2014-12-02
期刊:
影响因子:
5.7
通讯作者:
Zhang, Peijun
中科院分区:
文献类型:
--
作者:
Fu, Xiaofeng;Himes, Benjamin A.;Ke, Danxia;Rice, William J.;Ning, Jiying;Zhang, Peijun
Cryo-electron tomography (cryoET) has become a powerful tool for direct visualization of 3D structures of native biological specimens at molecular resolution, but its application is limited to thin specimens (<300 nm). Recently, vitreous sectioning and cryo-FIB milling technologies were developed to physically reduce the specimen thickness; however, cryoET analysis of membrane protein complexes within native cell membranes remains a great challenge. Here, we use phage φX174 lysis gene E to rapidly produce native, intact, bacterial cell membranes for high resolution cryoET. We characterized E gene-induced cell lysis using FIB/SEM and cryoEM and show that the bacteria cytoplasm was largely depleted through spot lesion, producing ghosts with the cell membranes intact. We further demonstrate the utility of E-gene-induced lysis for cryoET using the bacterial chemotaxis receptor signaling complex array. The described method should have a broad application for structural and functional studies of native, intact cell membranes and membrane protein complexes.
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影响因子:
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Li, Xueming;Mooney, Paul;Zheng, Shawn;Booth, Christopher R.;Braunfeld, Michael B.;Gubbens, Sander;Agard, David A.;Cheng, Yifan
通讯作者:
Cheng, Yifan
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通讯作者:
McIntosh, JR