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Annual Review of Biochemistry

Volume 86, 2017

Cellular Electron Cryotomography: Toward Structural Biology In Situ

Abstract

Electron cryotomography (ECT) provides three-dimensional views of macromolecular complexes inside cells in a native frozen–hydrated state. Over the last two decades, ECT has revealed the ultrastructure of cells in unprecedented detail. It has also allowed us to visualize the structures of macromolecular machines in their native context inside intact cells. In many cases, such machines cannot be purified intact for in vitro study. In other cases, the function of a structure is lost outside the cell, so that the mechanism can be understood only by observation in situ. In this review, we describe the technique and its history and provide examples of its power when applied to cell biology. We also discuss the integration of ECT with other techniques, including lower-resolution fluorescence imaging and higher-resolution atomic structure determination, to cover the full scale of cellular processes.

Keyword(s): cilia, CLEM, cryo–electron microscopy, cryo–electron tomography, electron cryotomography, flagella, hybrid methods, nuclear pore complex, type IV pili, type VI secretion
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2017-06-20
2025-04-18
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Cellular Electron Cryotomography: Toward Structural Biology In Situ
Annual Review of Biochemistry 86, 873 (2017); https://doi.org/10.1146/annurev-biochem-061516-044741
/content/journals/10.1146/annurev-biochem-061516-044741
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