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The translating bacterial ribosome at 1.55 Å resolution generated by cryo-EM imaging services
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The translating bacterial ribosome at 1.55 Å resolution generated by cryo-EM imaging services
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Journal Article
The translating bacterial ribosome at 1.55 Å resolution generated by cryo-EM imaging services
2023
Overview
Our understanding of protein synthesis has been conceptualised around the structure and function of the bacterial ribosome. This complex macromolecular machine is the target of important antimicrobial drugs, an integral line of defence against infectious diseases. Here, we describe how open access to cryo-electron microscopy facilities combined with bespoke user support enabled structural determination of the translating ribosome from
Escherichia coli
at 1.55 Å resolution. The obtained structures allow for direct determination of the rRNA sequence to identify ribosome polymorphism sites in the
E. coli
strain used in this study and enable interpretation of the ribosomal active and peripheral sites at unprecedented resolution. This includes scarcely populated chimeric hybrid states of the ribosome engaged in several tRNA translocation steps resolved at ~2 Å resolution. The current map not only improves our understanding of protein synthesis but also allows for more precise structure-based drug design of antibiotics to tackle rising bacterial resistance.
Developments in cryo-EM sample preparation and data collection are pivotal for structure determination. Fromm et al. present a 1.55 Å structure of the translating bacterial ribosome that provides new insights on its function and may allow for more precise structure-based drug design.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
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