2GIS

Structure of the S-adenosylmethionine riboswitch mRNA regulatory element


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.266 
  • R-Value Observed: 0.266 

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This is version 1.3 of the entry. See complete history


Literature

Structure of the S-adenosylmethionine riboswitch regulatory mRNA element.

Montange, R.K.Batey, R.T.

(2006) Nature 441: 1172-1175

  • DOI: 10.1038/nature04819
  • Primary Citation of Related Structures:  
    2GIS

  • PubMed Abstract: 
  • Riboswitches are cis-acting genetic regulatory elements found in the 5'-untranslated regions of messenger RNAs that control gene expression through their ability to bind small molecule metabolites directly. Regulation occurs through the interplay of two domains of the RNA: an aptamer domain that responds to intracellular metabolite concentrations and an expression platform that uses two mutually exclusive secondary structures to direct a decision-making process ...

    Riboswitches are cis-acting genetic regulatory elements found in the 5'-untranslated regions of messenger RNAs that control gene expression through their ability to bind small molecule metabolites directly. Regulation occurs through the interplay of two domains of the RNA: an aptamer domain that responds to intracellular metabolite concentrations and an expression platform that uses two mutually exclusive secondary structures to direct a decision-making process. In Gram-positive bacteria such as Bacillus species, riboswitches control the expression of more than 2% of all genes through their ability to respond to a diverse set of metabolites including amino acids, nucleobases and protein cofactors. Here we report the 2.9-angstroms resolution crystal structure of an S-adenosylmethionine (SAM)-responsive riboswitch from Thermoanaerobacter tengcongensis complexed with S-adenosylmethionine, an RNA element that controls the expression of several genes involved in sulphur and methionine metabolism. This RNA folds into a complex three-dimensional architecture that recognizes almost every functional group of the ligand through a combination of direct and indirect readout mechanisms. Ligand binding induces the formation of a series of tertiary interactions with one of the helices, serving as a communication link between the aptamer and expression platform domains.


    Organizational Affiliation

    Boehringer Ingelheim Pharma KG, Research Division, Birkendorfer Strasse 65, D-88397 Biberach/RISS, Germany. norbert.hauel@bc.boehringer-ingelheim.de



Macromolecules
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
SAM-I riboswitchA94N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.266 
  • R-Value Observed: 0.266 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.901α = 90
b = 62.901β = 90
c = 158.967γ = 90
Software Package:
Software NamePurpose
CNSrefinement
BOSdata collection
d*TREKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-07-04
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description