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@proceedings{1805130, author = {Demo, Gabriel and Carbone, Christine and Loveland, Anna and Svidritskiy, Egor and Gamper, Howard and Hou, YaandMing and Korostelev, Andrei}, booktitle = {XXVI. Annual Congress of Czech and Slovak Societies for Biochemistry and Molecular Biology}, keywords = {translation ribosome cryoEM}, language = {eng}, isbn = {978-80-907779-1-0}, title = {Cryo-EM ensemble captures EF-G mediated ribosomal translocation in action}, url = {https://csbmb2021.cz/detailed-programme/}, year = {2021} }
TY - CONF ID - 1805130 AU - Demo, Gabriel - Carbone, Christine - Loveland, Anna - Svidritskiy, Egor - Gamper, Howard - Hou, Ya-Ming - Korostelev, Andrei PY - 2021 TI - Cryo-EM ensemble captures EF-G mediated ribosomal translocation in action SN - 9788090777910 KW - translation ribosome cryoEM UR - https://csbmb2021.cz/detailed-programme/ N2 - During protein synthesis, transfer RNAs (tRNAs) and messenger RNA (mRNA) codons are translocated within the ribosome from the A to P to E sites, respectively. Translocation of tRNAs anticodons and mRNA along the small ribosomal 30S subunit is catalyzed by a conserved GTPase, elongation factor G(EF-G) in bacteria. The structural mechanism how the ribosome and EF-G maintain the open reading frame has not been visualized because the rapid GTP hydrolysis step has prevented the capture of authentic EF-G bound structural intermediates. Here, we present our single particle cryo-EM study aimed at characterizing translocation without using EF-G mutations or antibiotics. We report newly described intermediate structural state, which visualized the transition of two tRNAs from the A and P to P and E sites during translocation. The structure visualizes how nearly rigid EF-G rectifies inherent and spontaneous ribosomal dynamics into tRNA and mRNA translocation. This work therefore uncovers a missing link in the understanding of the synchronous movement of tRNAs and mRNA during translation elongation. ER -
DEMO, Gabriel, Christine CARBONE, Anna LOVELAND, Egor SVIDRITSKIY, Howard GAMPER, Ya-Ming HOU a Andrei KOROSTELEV. Cryo-EM ensemble captures EF-G mediated ribosomal translocation in action. In \textit{XXVI. Annual Congress of Czech and Slovak Societies for Biochemistry and Molecular Biology}. 2021. ISBN~978-80-907779-1-0.
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