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2qnh

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{{STRUCTURE_2qnh| PDB=2qnh | SCENE= }}
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'''Interactions and Dynamics of the Shine-Dalgarno Helix in the 70S Ribosome. This file, 2QNH, contains the 30S ribosome subunit, two TRNA, and MRNA molecules. 50S ribosome subunit is in the file 1VSP.'''
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===Interactions and Dynamics of the Shine-Dalgarno Helix in the 70S Ribosome. This file, 2QNH, contains the 30S ribosome subunit, two TRNA, and MRNA molecules. 50S ribosome subunit is in the file 1VSP.===
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==Overview==
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The crystal structure of an initiation-like 70S ribosome complex containing an 8-bp Shine-Dalgarno (SD) helix was determined at 3.8-A resolution. Translation-libration-screw analysis showed that the inherent anisotropic motions of the SD helix were biased along its helical axis, suggesting that during the first step of translocation, the SD helix moves along its helical screw axis. Contacts between the SD helix and the ribosome were primarily through interactions with helices 23a, 26, and 28 of 16S rRNA. Contact with the neck (helix 28) of the 30S subunit near its hinge point suggests that formation of the SD helix could affect positioning of the head of the 30S subunit for optimal interaction with initiator tRNA. The bulged U723 in helix 23a interacts with the minor groove of the SD helix at the C1539.G-10 base pair, explaining its selective conservation in bacteria and archaea.
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(as it appears on PubMed at http://www.pubmed.gov), where 17940016 is the PubMed ID number.
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{{ABSTRACT_PUBMED_17940016}}
==About this Structure==
==About this Structure==
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[[Category: Zinc]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 15:14:58 2008''
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Revision as of 07:20, 28 July 2008

Image:2qnh.png

Template:STRUCTURE 2qnh

Interactions and Dynamics of the Shine-Dalgarno Helix in the 70S Ribosome. This file, 2QNH, contains the 30S ribosome subunit, two TRNA, and MRNA molecules. 50S ribosome subunit is in the file 1VSP.

Template:ABSTRACT PUBMED 17940016

About this Structure

2QNH is a Protein complex structure of sequences from Thermus thermophilus. Full crystallographic information is available from OCA.

Reference

Interactions and dynamics of the Shine Dalgarno helix in the 70S ribosome., Korostelev A, Trakhanov S, Asahara H, Laurberg M, Lancaster L, Noller HF, Proc Natl Acad Sci U S A. 2007 Oct 23;104(43):16840-3. Epub 2007 Oct 16. PMID:17940016

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