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-Structure paper
タイトル | The chemical landscape of the human ribosome at 1.67 Å resolution. |
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ジャーナル・号・ページ | bioRxiv, Year 2023 |
掲載日 | 2023年2月28日 |
著者 | Alexandre Faille / Kyle C Dent / Simone Pellegrino / Pekka Jaako / Alan J Warren |
PubMed 要旨 | The ability of ribosomes to translate the genetic code into protein requires a finely tuned ion and solvent ecosystem. However, the lack of high-resolution structures has precluded accurate ...The ability of ribosomes to translate the genetic code into protein requires a finely tuned ion and solvent ecosystem. However, the lack of high-resolution structures has precluded accurate positioning of all the functional elements of the ribosome and limited our understanding of the specific role of ribosomal RNA chemical modifications in modulating ribosome function in health and disease. Here, using a new sample preparation methodology based on functionalised pristine graphene-coated grids, we solve the cryo-EM structure of the human large ribosomal subunit to a resolution of 1.67 Å. The accurate assignment of water molecules, magnesium and potassium ions in our model highlights the fundamental biological role of ribosomal RNA methylation in harnessing unconventional carbon-oxygen hydrogen bonds to establish chemical interactions with the environment and fine-tune the functional interplay with tRNA. In addition, the structures of three translational inhibitors bound to the human large ribosomal subunit at better than 2 Å resolution provide mechanistic insights into how three key druggable pockets of the ribosome are targeted and illustrate the potential of this methodology to accelerate high-throughput structure-based design of anti-cancer therapeutics. |
リンク | bioRxiv / PubMed:36909531 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 1.67 Å |
構造データ | EMDB-15113, PDB-8a3d: |
化合物 | ChemComp-MG: ChemComp-K: ChemComp-NA: ChemComp-HMT: ChemComp-SPM: ChemComp-EPE: ChemComp-ZN: ChemComp-HOH: |
由来 |
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キーワード | TRANSLATION / Ribosome / human / rna modifications / water / magnesium / potassium / homoharringtonine |