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Annual Review of Virology

Volume 7, 2020

Cellular Electron Cryo-Tomography to Study Virus-Host Interactions

Abstract

Viruses are obligatory intracellular parasites that reprogram host cells upon infection to produce viral progeny. Here, we review recent structural insights into virus-host interactions in bacteria, archaea, and eukaryotes unveiled by cellular electron cryo-tomography (cryoET). This advanced three-dimensional imaging technique of vitreous samples in near-native state has matured over the past two decades and proven powerful in revealing molecular mechanisms underlying viral replication. Initial studies were restricted to cell peripheries and typically focused on early infection steps, analyzing surface proteins and viral entry. Recent developments including cryo-thinning techniques, phase-plate imaging, and correlative approaches have been instrumental in also targeting rare events inside infected cells. When combined with advances in dedicated image analyses and processing methods, details of virus assembly and egress at (sub)nanometer resolution were uncovered. Altogether, we provide a historical and technical perspective and discuss future directions and impacts of cryoET for integrative structural cell biology analyses of viruses.

Keyword(s): archaea, bacteria, high-resolution microscopy, structure, virus replication cycle
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/content/journals/10.1146/annurev-virology-021920-115935
2020-09-29
2024-04-19
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/content/journals/10.1146/annurev-virology-021920-115935
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Cellular Electron Cryo-Tomography to Study Virus-Host Interactions
Annual Review of Virology 7, 239 (2020); https://doi.org/10.1146/annurev-virology-021920-115935
/content/journals/10.1146/annurev-virology-021920-115935
/content/journals/10.1146/annurev-virology-021920-115935
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