Domain movements of elongation factor eEF2 and the eukaryotic 80S ribosome facilitate tRNA translocation.Spahn, C.M., Gomez-Lorenzo, M.G., Grassucci, R.A., Jorgensen, R., Andersen, G.R., Beckmann, R., Penczek, P.A., Ballesta, J.P., Frank, J.
(2004) Embo J. 23: 1008-1019
- PubMed: 14976550
- DOI: 10.1038/sj.emboj.7600102
- Primary Citation of Related Structures:
- PubMed Abstract:
- The large ribosomal subunit stalk as a regulatory element of the eukaryotic translational machinery.
Ballesta, J.P.,Remacha, M.
(1996) PROG.NUCLEIC ACID RES.MOL.BIOL. 55: 157
- The complete atomic structure of the large ribosomal subunit at 2.4 A resolution
Ban, N.,Nissen, P.,Hansen, J.,Moore, P.B.,Steitz, T.A.
(2000) Science 289: 905
- EF-G-dependent GTP hydrolysis induces translocation accompanied by large conformational changes in the 70S ribosome
Agrawal, R.K.,Heagle, A.B.,Penczek, P.,Grassucci, R.A.,Frank, J.
(1999) Nat.Struct.Mol.Biol. 6: 643
An 11.7-A-resolution cryo-EM map of the yeast 80S.eEF2 complex in the presence of the antibiotic sordarin was interpreted in molecular terms, revealing large conformational changes within eEF2 and the 80S ribosome, including a rearrangement of the fu ...
An 11.7-A-resolution cryo-EM map of the yeast 80S.eEF2 complex in the presence of the antibiotic sordarin was interpreted in molecular terms, revealing large conformational changes within eEF2 and the 80S ribosome, including a rearrangement of the functionally important ribosomal intersubunit bridges. Sordarin positions domain III of eEF2 so that it can interact with the sarcin-ricin loop of 25S rRNA and protein rpS23 (S12p). This particular conformation explains the inhibitory action of sordarin and suggests that eEF2 is stalled on the 80S ribosome in a conformation that has similarities with the GTPase activation state. A ratchet-like subunit rearrangement (RSR) occurs in the 80S.eEF2.sordarin complex that, in contrast to Escherichia coli 70S ribosomes, is also present in vacant 80S ribosomes. A model is suggested, according to which the RSR is part of a mechanism for moving the tRNAs during the translocation reaction.
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