Download MendeleyDynamics of uS19 C-Terminal Tail during the Translation Elongation Cycle in Human Ribosomes.
Bhaskar, V., Graff-Meyer, A., Schenk, A.D., Cavadini, S., von Loeffelholz, O., Natchiar, S.K., Artus-Revel, C.G., Hotz, H.R., Bretones, G., Klaholz, B.P., Chao, J.A.(2020) Cell Rep 31: 107473-107473
- PubMed: 32268098
- DOI: https://doi.org/10.1016/j.celrep.2020.03.037
- Primary Citation of Related Structures:
6Y0G, 6Y2L, 6Y57 - PubMed Abstract:
Ribosomes undergo multiple conformational transitions during translation elongation. Here, we report the high-resolution cryoelectron microscopy (cryo-EM) structure of the human 80S ribosome in the post-decoding pre-translocation state (classical-PRE) at 3.3-Å resolution along with the rotated (hybrid-PRE) and the post-translocation states (POST). The classical-PRE state ribosome structure reveals a previously unobserved interaction between the C-terminal region of the conserved ribosomal protein uS19 and the A- and P-site tRNAs and the mRNA in the decoding site. In addition to changes in the inter-subunit bridges, analysis of different ribosomal conformations reveals the dynamic nature of this domain and suggests a role in tRNA accommodation and translocation during elongation. Furthermore, we show that disease-associated mutations in uS19 result in increased frameshifting. Together, this structure-function analysis provides mechanistic insights into the role of the uS19 C-terminal tail in the context of mammalian ribosomes.
Organizational Affiliation:
Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland.
