Cited by 263RNA and protein synthesis mechanismsAdvanced Electron Microscopy Techniques and ApplicationsEnzyme Structure and Function

Structure of the bacterial ribosome at 2 Å resolution

Open access
Watson, Zoe L, Ward, Fred R, Méheust, Raphaël, Ad, Omer, Schepartz, Alanna, Banfield, Jillian F, Cate, Jamie HD·2020·eLife

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Abstract

Using cryo-electron microscopy (cryo-EM), we determined the structure of the Escherichia coli 70S ribosome with a global resolution of 2.0 Å. The maps reveal unambiguous positioning of protein and RNA residues, their detailed chemical interactions, and chemical modifications. Notable features include the first examples of isopeptide and thioamide backbone substitutions in ribosomal proteins, the former likely conserved in all domains of life. The maps also reveal extensive solvation of the small (30S) ribosomal subunit, and interactions with A-site and P-site tRNAs, mRNA, and the antibiotic paromomycin. The maps and models of the bacterial ribosome presented here now allow a deeper phylogenetic analysis of ribosomal components including structural conservation to the level of solvation. The high quality of the maps should enable future structural analyses of the chemical basis for translation and aid the development of robust tools for cryo-EM structure modeling and refinement.

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  • In the E. coli 70S ribosome, 309 Mg2+ and 2 Zn2+ ions were assigned by cryo-EM, but K+ was not included in the solvent and was not assigned.

    “In the E. coli 70S ribosome, 309 Mg2+ and 2 Zn2+ ions were assigned by this method, but K+ was not included in the solvent and was not assigned.67”
  • Two complexes, Rpl12B-Rmt2 and Rpl7A-Fpr4, involving enzymes that introduce protein modifications such as arginine methylations or proline isomerizations, provide insight into mechanisms that expand the chemical diversity of ribosomal proteins at functional sites and possibly regulate translation.

    “Two complexes, Rpl12B–Rmt2 and Rpl7A–Fpr4, involving enzymes that introduce protein modifications such as arginine methylations or proline isomerizations (47), provide insight into mechanisms that expand the chemical diversity of ribosomal proteins at functional sites (48) and possibly regulate translation (49).”

    From Computed structures of core eukaryotic protein complexes (2021) · cites this paper as [48]

  • Ribosome structures can now be determined to better than 2 Å resolution using cryo-electron microscopy (cryo-EM).

    “Ribosome structures can now be determined to better than 2 Å resolution using cryo-electron microscopy (cryo-EM).67”

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Research works printed but not linked: 2

  1. [9]9. Benítez-Páez A Cárdenas-Brito S Corredor M Villarroya M Armengod ME 2014 Impairing methylations at ribosome RNA, a point mutation-dependent strategy for aminoglycoside resistance: the rsmG case Biomedica 34 41 49 10.1590/S0120-41572014000500006 24968035 · DOI
  2. [121]121. Zhang K Pintilie GD Li S Schmid MF 2020 Resolving Individual-Atom of protein complex using commonly available 300-kV Cryo-electron microscopes bioRxiv 10.1101/2020.08.19.256909 · DOI

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Authors
Watson, Z. L., Ward, F. R., Méheust, R., Ad, O., Schepartz, A., Banfield, J. F., & Cate, J. H.
Affiliations
  • University of California, Berkeley (US)
  • Innovative Genomics Institute (US)
  • Yale University (US)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
Cate, Jamie HD
Venue
eLife
Published
2020-09-14
Volume
9
ISSN
2050-084X (ISSN-L)
OpenAlex
W4211030178
Cited by
263
References
130
Citations by year
2026: 38 · 2025: 33 · 2024: 53 · 2023: 50 · 2022: 50 · 2021: 32 · 2020: 5
FWCI
11.14
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • eScholarship (California Digital Library) (submittedVersion)
  • HAL (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by)
Funders
  • National Science Foundation (CHE-2021739)
  • National Institutes of Health (R01-114454)
  • Innovative Genomics Institute
  • Chan Zuckerberg Biohub
  • Agilent Technologies
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Advanced Electron Microscopy Techniques and Applications
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
bacterial ribosome, ribosome structure, ribosomal proteins, isopeptide bonds, tRNA binding sites, paromomycin, ribosome evolution, translation (biology)

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