Localization of L11 protein on the ribosome and elucidation of its involvement in EF-G-dependent translocation.Agrawal, R.K., Linde, J., Sengupta, J., Nierhaus, K.H., Frank, J.
(2001) J.Mol.Biol. 311: 777-787
- PubMed: 11518530
- DOI: 10.1006/jmbi.2001.4907
- Primary Citation of Related Structures:  1JQS, 1JQT
- PubMed Abstract:
- Three-dimensional structure of the ribosomal translocase: Elongation factor G from Thermus thermophilus
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- Structure of a Mutant EF-G Reveals Domain III and Possibly the Fusidic Acid Binding Site
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- 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
- 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
- The Crystal Structure of Elongation Factor G Complexed with GDP, at 2.7A Resolution.
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(1994) Embo J. 13: 3661
L11 protein is located at the base of the L7/L12 stalk of the 50 S subunit of the Escherichia coli ribosome. Because of the flexible nature of the region, recent X-ray crystallographic studies of the 50 S subunit failed to locate the N-terminal domai ...
L11 protein is located at the base of the L7/L12 stalk of the 50 S subunit of the Escherichia coli ribosome. Because of the flexible nature of the region, recent X-ray crystallographic studies of the 50 S subunit failed to locate the N-terminal domain of the protein. We have determined the position of the complete L11 protein by comparing a three-dimensional cryo-EM reconstruction of the 70 S ribosome, isolated from a mutant lacking ribosomal protein L11, with the three-dimensional map of the wild-type ribosome. Fitting of the X-ray coordinates of L11-23 S RNA complex and EF-G into the cryo-EM maps combined with molecular modeling, reveals that, following EF-G-dependent GTP hydrolysis, domain V of EF-G intrudes into the cleft between the 23 S ribosomal RNA and the N-terminal domain of L11 (where the antibiotic thiostrepton binds), causing the N-terminal domain to move and thereby inducing the formation of the arc-like connection with the G' domain of EF-G. The results provide a new insight into the mechanism of EF-G-dependent translocation.
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