1qza
From Proteopedia
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| - | [[Image:1qza.gif|left|200px]] | + | [[Image:1qza.gif|left|200px]] |
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| - | '''Coordinates of the A/T site tRNA model fitted into the cryo-EM map of EF-Tu ternary complex (GDP.Kirromycin) bound 70S ribosome''' | + | {{Structure |
| + | |PDB= 1qza |SIZE=350|CAPTION= <scene name='initialview01'>1qza</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''Coordinates of the A/T site tRNA model fitted into the cryo-EM map of EF-Tu ternary complex (GDP.Kirromycin) bound 70S ribosome''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1QZA is a [ | + | 1QZA is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QZA OCA]. |
==Reference== | ==Reference== | ||
| - | Incorporation of aminoacyl-tRNA into the ribosome as seen by cryo-electron microscopy., Valle M, Zavialov A, Li W, Stagg SM, Sengupta J, Nielsen RC, Nissen P, Harvey SC, Ehrenberg M, Frank J, Nat Struct Biol. 2003 Nov;10(11):899-906. Epub 2003 Oct 19. PMID:[http:// | + | Incorporation of aminoacyl-tRNA into the ribosome as seen by cryo-electron microscopy., Valle M, Zavialov A, Li W, Stagg SM, Sengupta J, Nielsen RC, Nissen P, Harvey SC, Ehrenberg M, Frank J, Nat Struct Biol. 2003 Nov;10(11):899-906. Epub 2003 Oct 19. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14566331 14566331] |
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Ehrenberg, M.]] | [[Category: Ehrenberg, M.]] | ||
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[[Category: trna model]] | [[Category: trna model]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:44:45 2008'' |
Revision as of 11:44, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
Coordinates of the A/T site tRNA model fitted into the cryo-EM map of EF-Tu ternary complex (GDP.Kirromycin) bound 70S ribosome
Overview
Aminoacyl-tRNAs (aa-tRNAs) are delivered to the ribosome as part of the ternary complex of aa-tRNA, elongation factor Tu (EF-Tu) and GTP. Here, we present a cryo-electron microscopy (cryo-EM) study, at a resolution of approximately 9 A, showing that during the incorporation of the aa-tRNA into the 70S ribosome of Escherichia coli, the flexibility of aa-tRNA allows the initial codon recognition and its accommodation into the ribosomal A site. In addition, a conformational change observed in the GTPase-associated center (GAC) of the ribosomal 50S subunit may provide the mechanism by which the ribosome promotes a relative movement of the aa-tRNA with respect to EF-Tu. This relative rearrangement seems to facilitate codon recognition by the incoming aa-tRNA, and to provide the codon-anticodon recognition-dependent signal for the GTPase activity of EF-Tu. From these new findings we propose a mechanism that can explain the sequence of events during the decoding of mRNA on the ribosome.
About this Structure
1QZA is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
Incorporation of aminoacyl-tRNA into the ribosome as seen by cryo-electron microscopy., Valle M, Zavialov A, Li W, Stagg SM, Sengupta J, Nielsen RC, Nissen P, Harvey SC, Ehrenberg M, Frank J, Nat Struct Biol. 2003 Nov;10(11):899-906. Epub 2003 Oct 19. PMID:14566331
Page seeded by OCA on Thu Mar 20 13:44:45 2008
Categories: Protein complex | Ehrenberg, M. | Frank, J. | Harvey, S C. | Li, W. | Nielsen, R C. | Nissen, P. | Sengupta, J. | Stagg, S M. | Valle, M. | Zavialov, A. | A/t-site trna. | Decoding | Trna model
