2qwy: Difference between revisions

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[[Image:2qwy.jpg|left|200px]]
{{Seed}}
[[Image:2qwy.png|left|200px]]


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{{STRUCTURE_2qwy|  PDB=2qwy  |  SCENE=  }}  
{{STRUCTURE_2qwy|  PDB=2qwy  |  SCENE=  }}  


'''SAM-II riboswitch bound to S-adenosylmethionine'''
===SAM-II riboswitch bound to S-adenosylmethionine===




==Overview==
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In bacteria, numerous genes harbor regulatory elements in the 5' untranslated regions of their mRNA, termed riboswitches, which control gene expression by binding small-molecule metabolites. These sequences influence the secondary and tertiary structure of the RNA in a ligand-dependent manner, thereby directing its transcription or translation. The crystal structure of an S-adenosylmethionine-responsive riboswitch found predominantly in proteobacteria, SAM-II, has been solved to reveal a second means by which RNA interacts with this important cellular metabolite. Notably, this is the first structure of a complete riboswitch containing all sequences associated with both the ligand binding aptamer domain and the regulatory expression platform. Chemical probing of this RNA in the absence and presence of ligand shows how the structure changes in response to S-adenosylmethionine to sequester the ribosomal binding site and affect translational gene regulation.
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{{ABSTRACT_PUBMED_18204466}}


==About this Structure==
==About this Structure==
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[[Category: S-adenosylmethionine]]
[[Category: S-adenosylmethionine]]
[[Category: Sam]]
[[Category: Sam]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 15:50:55 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 00:33:59 2008''

Revision as of 21:34, 27 July 2008

File:2qwy.png

Template:STRUCTURE 2qwy

SAM-II riboswitch bound to S-adenosylmethionine

Template:ABSTRACT PUBMED 18204466

About this Structure

2QWY is a Single protein structure. Full crystallographic information is available from OCA.

Reference

Structure of the SAM-II riboswitch bound to S-adenosylmethionine., Gilbert SD, Rambo RP, Van Tyne D, Batey RT, Nat Struct Mol Biol. 2008 Feb;15(2):177-82. Epub 2008 Jan 20. PMID:18204466

Page seeded by OCA on Mon Jul 28 00:33:59 2008

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