1r2x: Difference between revisions
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'''Coordinates of L11 with 58nts of 23S rRNA fitted into the cryo-EM map of EF-Tu ternary complex (GDP.Kirromycin) bound 70S ribosome''' | {{Structure | ||
|PDB= 1r2x |SIZE=350|CAPTION= <scene name='initialview01'>1r2x</scene> | |||
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|LIGAND= | |||
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'''Coordinates of L11 with 58nts of 23S rRNA 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== | ||
1R2X is a [ | 1R2X is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R2X 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: Single protein]] | [[Category: Single protein]] | ||
[[Category: Thermotoga maritima]] | [[Category: Thermotoga maritima]] | ||
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[[Category: rna]] | [[Category: rna]] | ||
''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 13:46:10 2008'' | ||
Revision as of 14:46, 20 March 2008
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Coordinates of L11 with 58nts of 23S rRNA fitted into the cryo-EM map of EF-Tu ternary complex (GDP.Kirromycin) bound 70S ribosome
OverviewOverview
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 StructureAbout this Structure
1R2X is a Single protein structure of sequence from Thermotoga maritima. Full crystallographic information is available from OCA.
ReferenceReference
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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