1qza: Difference between revisions
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[[Image:1qza.gif|left|200px]] | [[Image:1qza.gif|left|200px]] | ||
'''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= | |||
}} | |||
'''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
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