2gv3

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[[Image:2gv3.gif|left|200px]]
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{{Seed}}
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[[Image:2gv3.png|left|200px]]
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{{STRUCTURE_2gv3| PDB=2gv3 | SCENE= }}
{{STRUCTURE_2gv3| PDB=2gv3 | SCENE= }}
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'''Translocation of a tRNA with an extended anticodon through the ribosome'''
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===Translocation of a tRNA with an extended anticodon through the ribosome===
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==Overview==
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Coordinated translocation of the tRNA-mRNA complex by the ribosome occurs in a precise, stepwise movement corresponding to a distance of three nucleotides along the mRNA. Frameshift suppressor tRNAs generally contain an extra nucleotide in the anticodon loop and they subvert the normal mechanisms used by the ribosome for frame maintenance. The mechanism by which suppressor tRNAs traverse the ribosome during translocation is poorly understood. Here, we demonstrate translocation of a tRNA by four nucleotides from the A site to the P site, and from the P site to the E site. We show that translocation of a punctuated mRNA is possible with an extra, unpaired nucleotide between codons. Interestingly, the NMR structure of the four nucleotide anticodon stem-loop reveals a conformation different from the canonical tRNA structure. Flexibility within the loop may allow conformational adjustment upon A site binding and for interacting with the four nucleotide codon in order to shift the mRNA reading frame.
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The line below this paragraph, {{ABSTRACT_PUBMED_16787653}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 16787653 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16787653}}
==About this Structure==
==About this Structure==
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GV3 OCA].
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Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GV3 OCA].
==Reference==
==Reference==
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[[Category: Yoshizawa, S.]]
[[Category: Yoshizawa, S.]]
[[Category: Stemloop]]
[[Category: Stemloop]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 05:34:24 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 17:40:54 2008''

Revision as of 14:40, 27 July 2008

Image:2gv3.png

Template:STRUCTURE 2gv3

Translocation of a tRNA with an extended anticodon through the ribosome

Template:ABSTRACT PUBMED 16787653

About this Structure

Full experimental information is available from OCA.

Reference

Translocation of a tRNA with an extended anticodon through the ribosome., Phelps SS, Gaudin C, Yoshizawa S, Benitez C, Fourmy D, Joseph S, J Mol Biol. 2006 Jul 14;360(3):610-22. Epub 2006 May 22. PMID:16787653

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