1s1i: Difference between revisions

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[[Image:1s1i.gif|left|200px]]
{{Seed}}
[[Image:1s1i.png|left|200px]]


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{{STRUCTURE_1s1i|  PDB=1s1i  |  SCENE=  }}  
{{STRUCTURE_1s1i|  PDB=1s1i  |  SCENE=  }}  


'''Structure of the ribosomal 80S-eEF2-sordarin complex from yeast obtained by docking atomic models for RNA and protein components into a 11.7 A cryo-EM map. This file, 1S1I, Contains 60S subunit. The 40S Ribosomal Subunit Is In File 1S1H.'''
===Structure of the ribosomal 80S-eEF2-sordarin complex from yeast obtained by docking atomic models for RNA and protein components into a 11.7 A cryo-EM map. This file, 1S1I, Contains 60S subunit. The 40S Ribosomal Subunit Is In File 1S1H.===




==Overview==
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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.
The line below this paragraph, {{ABSTRACT_PUBMED_14976550}}, adds the Publication Abstract to the page
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{{ABSTRACT_PUBMED_14976550}}


==About this Structure==
==About this Structure==
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[[Category: Sordarin]]
[[Category: Sordarin]]
[[Category: Trna translocation]]
[[Category: Trna translocation]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Apr 30 13:50:19 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 02:42:12 2008''
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