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1jqt

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[[Image:1jqt.gif|left|200px]]
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{{STRUCTURE_1jqt| PDB=1jqt | SCENE= }}
{{STRUCTURE_1jqt| PDB=1jqt | SCENE= }}
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'''Fitting of L11 protein in the low resolution cryo-EM map of E.coli 70S ribosome'''
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===Fitting of L11 protein in the low resolution cryo-EM map of E.coli 70S ribosome===
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==Overview==
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L11 protein is located at the base of the L7/L12 stalk of the 50 S subunit of the Escherichia coli ribosome. Because of the flexible nature of the region, recent X-ray crystallographic studies of the 50 S subunit failed to locate the N-terminal domain of the protein. We have determined the position of the complete L11 protein by comparing a three-dimensional cryo-EM reconstruction of the 70 S ribosome, isolated from a mutant lacking ribosomal protein L11, with the three-dimensional map of the wild-type ribosome. Fitting of the X-ray coordinates of L11-23 S RNA complex and EF-G into the cryo-EM maps combined with molecular modeling, reveals that, following EF-G-dependent GTP hydrolysis, domain V of EF-G intrudes into the cleft between the 23 S ribosomal RNA and the N-terminal domain of L11 (where the antibiotic thiostrepton binds), causing the N-terminal domain to move and thereby inducing the formation of the arc-like connection with the G' domain of EF-G. The results provide a new insight into the mechanism of EF-G-dependent translocation.
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(as it appears on PubMed at http://www.pubmed.gov), where 11518530 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11518530}}
==About this Structure==
==About this Structure==
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[[Category: Cryo-em]]
[[Category: Cryo-em]]
[[Category: L11]]
[[Category: L11]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 21:41:09 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 20:39:46 2008''

Revision as of 17:39, 1 July 2008

Image:1jqt.png

Template:STRUCTURE 1jqt

Fitting of L11 protein in the low resolution cryo-EM map of E.coli 70S ribosome

Template:ABSTRACT PUBMED 11518530

About this Structure

1JQT is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Localization of L11 protein on the ribosome and elucidation of its involvement in EF-G-dependent translocation., Agrawal RK, Linde J, Sengupta J, Nierhaus KH, Frank J, J Mol Biol. 2001 Aug 24;311(4):777-87. PMID:11518530

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