3FU2

Cocrystal structure of a class-I preQ1 riboswitch

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.214 

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Literature

Cocrystal structure of a class I preQ1 riboswitch reveals a pseudoknot recognizing an essential hypermodified nucleobase

Klein, D.J., Edwards, T.E., Ferre-D'Amare, A.R.

(2009) Nat Struct Mol Biol 16: 343-344

  • DOI: 10.1038/nsmb.1563
  • Primary Citation of Related Structures:  
    3FU2, 3K1V

  • PubMed Abstract: 

    • Riboswitches are mRNA domains that bind metabolites and modulate gene expression in cis. We report cocrystal structures of a remarkably compact riboswitch (34 nucleotides suffice for ligand recognition) from Bacillus subtilis that is selective for the essential nucleobase preQ(1) (7-aminomethyl-7-deazaguanine) ...

    Riboswitches are mRNA domains that bind metabolites and modulate gene expression in cis. We report cocrystal structures of a remarkably compact riboswitch (34 nucleotides suffice for ligand recognition) from Bacillus subtilis that is selective for the essential nucleobase preQ(1) (7-aminomethyl-7-deazaguanine). The structures reveal a previously unrecognized pseudoknot fold and suggest a conserved gene-regulatory mechanism whereby ligand binding promotes sequestration of an RNA segment that otherwise assembles into a transcriptional antiterminator.

    Organizational Affiliation: 

    Division of Basic Sciences, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, Washington 98109-1024, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsLengthOrganismImage
PreQ1 riboswitchA, B, C34N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.214 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.208α = 90
b = 78.208β = 90
c = 85.22γ = 120
Software Package:
Software NamePurpose
CrystalCleardata collection
PHASERphasing
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance