3SLM

Crystal structure of the 2'- Deoxyguanosine riboswitch bound to 2'-deoxyguanosine-5'-monophosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural principles of nucleoside selectivity in a 2'-deoxyguanosine riboswitch.

Pikovskaya, O.Polonskaia, A.Patel, D.J.Serganov, A.

(2011) Nat.Chem.Biol. 7: 748-755

  • DOI: 10.1038/nchembio.631
  • Primary Citation of Related Structures:  3SKI, 3SKL, 3SKR, 3SKT, 3SKW, 3SKZ, 3SLQ

  • PubMed Abstract: 
  • Purine riboswitches have an essential role in genetic regulation of bacterial metabolism. This family includes the 2'-deoxyguanosine (dG) riboswitch, which is involved in feedback control of deoxyguanosine biosynthesis. To understand the principles t ...

    Purine riboswitches have an essential role in genetic regulation of bacterial metabolism. This family includes the 2'-deoxyguanosine (dG) riboswitch, which is involved in feedback control of deoxyguanosine biosynthesis. To understand the principles that define dG selectivity, we determined crystal structures of the natural Mesoplasma florum riboswitch bound to cognate dG as well as to noncognate guanosine, deoxyguanosine monophosphate and guanosine monophosphate. Comparison with related purine riboswitch structures reveals that the dG riboswitch achieves its specificity through modification of key interactions involving the nucleobase and rearrangement of the ligand-binding pocket to accommodate the additional sugar moiety. In addition, we observe new conformational changes beyond the junctional binding pocket extending as far as peripheral loop-loop interactions. It appears that re-engineering riboswitch scaffolds will require consideration of selectivity features dispersed throughout the riboswitch tertiary fold, and structure-guided drug design efforts targeted to junctional RNA scaffolds need to be addressed within such an expanded framework.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
RNA (68-MER)A,B68N/A
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
SIN
Query on SIN

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Download CCD File 
A
SUCCINIC ACID
C4 H6 O4
KDYFGRWQOYBRFD-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
DGP
Query on DGP

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Download CCD File 
A, B
2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE
C10 H14 N5 O7 P
LTFMZDNNPPEQNG-KVQBGUIXSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CCC
Query on CCC
A, B
RNA LINKINGC9 H13 N3 O10 P2C
GTP
Query on GTP
A, B
NON-POLYMERC10 H16 N5 O14 P3G
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
DGPKd: 379000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 95.954α = 90.00
b = 66.058β = 117.95
c = 72.503γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
CBASSdata collection
MOLREPphasing
HKL-2000data scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-17
    Type: Initial release
  • Version 1.1: 2011-10-26
    Type: Database references