2e5l

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{{STRUCTURE_2e5l| PDB=2e5l | SCENE= }}
{{STRUCTURE_2e5l| PDB=2e5l | SCENE= }}
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'''A snapshot of the 30S ribosomal subunit capturing mRNA via the Shine- Dalgarno interaction'''
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===A snapshot of the 30S ribosomal subunit capturing mRNA via the Shine- Dalgarno interaction===
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==Overview==
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In the initiation phase of bacterial translation, the 30S ribosomal subunit captures mRNA in preparation for binding with initiator tRNA. The purine-rich Shine-Dalgarno (SD) sequence, in the 5' untranslated region of the mRNA, anchors the 30S subunit near the start codon, via base pairing with an anti-SD (aSD) sequence at the 3' terminus of 16S rRNA. Here, we present the 3.3 A crystal structure of the Thermus thermophilus 30S subunit bound with an mRNA mimic. The duplex formed by the SD and aSD sequences is snugly docked in a "chamber" between the head and platform domains, demonstrating how the 30S subunit captures and stabilizes the otherwise labile SD helix. This location of the SD helix is suitable for the placement of the start codon AUG in the immediate vicinity of the mRNA channel, in agreement with reported crosslinks between the second position of the start codon and G1530 of 16S rRNA.
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{{ABSTRACT_PUBMED_17355865}}
==About this Structure==
==About this Structure==
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[[Category: Structural genomic]]
[[Category: Structural genomic]]
[[Category: Translation initiation]]
[[Category: Translation initiation]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 01:57:21 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 14:26:25 2008''

Revision as of 11:26, 27 July 2008

Image:2e5l.png

Template:STRUCTURE 2e5l

A snapshot of the 30S ribosomal subunit capturing mRNA via the Shine- Dalgarno interaction

Template:ABSTRACT PUBMED 17355865

About this Structure

2E5L is a Protein complex structure of sequences from Thermus thermophilus. Full crystallographic information is available from OCA.

Reference

A snapshot of the 30S ribosomal subunit capturing mRNA via the Shine-Dalgarno interaction., Kaminishi T, Wilson DN, Takemoto C, Harms JM, Kawazoe M, Schluenzen F, Hanawa-Suetsugu K, Shirouzu M, Fucini P, Yokoyama S, Structure. 2007 Mar;15(3):289-97. PMID:17355865

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