Interaction of the G' Domain of Elongation Factor G and the C-Terminal Domain of Ribosomal Protein L7/L12 during Translocation as Revealed by Cryo-EM.Datta, P.P., Sharma, M.R., Qi, L., Frank, J., Agrawal, R.K.
(2005) Mol.Cell 20: 723-731
- PubMed: 16337596
- DOI: 10.1016/j.molcel.2005.10.028
- PubMed Abstract:
- Three-dimensional structure of the ribosomal translocase: elongation factor G from Thermus thermophilus
Aevarsson, A.,Brazhnikov, E.,Garber, M.,Zheltonosova, J.,Chirgadze, Y.,al-Karadaghi, S.,Svensson, L.A.,Liljas, A.
(1994) Embo J. 13: 3669
- A detailed view of a ribosomal active site: the structure of the L11-RNA complex
Wimberly, B.T.,Guymon, R.,McCutcheon, J.P.,White, S.W.,Ramakrishnan, V.
(1999) Cell 97: 491
- Structure of the C-terminal domain of the ribosomal protein L7/L12 from Escherichia coli at 1.7
Leijonmarck, M.,Liljas, A.
(1987) J.Mol.Biol. 195: 555
During tRNA translocation on the ribosome, an arc-like connection (ALC) is formed between the G' domain of elongation factor G (EF-G) and the L7/L12-stalk base of the large ribosomal subunit in the GDP state. To delineate the boundary of EF-G within ...
During tRNA translocation on the ribosome, an arc-like connection (ALC) is formed between the G' domain of elongation factor G (EF-G) and the L7/L12-stalk base of the large ribosomal subunit in the GDP state. To delineate the boundary of EF-G within the ALC, we tagged an amino acid residue near the tip of the G' domain of EF-G with undecagold, which was then visualized with three-dimensional cryo-electron microscopy (cryo-EM). Two distinct positions for the undecagold, observed in the GTP-state and GDP-state cryo-EM maps of the ribosome bound EF-G, allowed us to determine the movement of the labeled amino acid. Molecular analyses of the cryo-EM maps show: (1) that three structural components, the N-terminal domain of ribosomal protein L11, the C-terminal domain of ribosomal protein L7/L12, and the G' domain of EF-G, participate in formation of the ALC; and (2) that both EF-G and the ribosomal protein L7/L12 undergo large conformational changes to form the ALC.
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