3NPN

Structure of the s-adenosylhomocysteine riboswitch at 3.0A


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1hanging drop72982.25 mM Spermine, 9 mM magnesium chloride, 0.9 mM spermidine, 1.8 mM Cobalt(III)hexammine chloride, 0.05 M sodium cacodylate pH 7.0, 5% (v/v) PEG 400, 20 mM iridium (III) hexammine chloride, hanging drop, temperature 298K
Crystal Properties
Matthews coefficientSolvent content
3.2962.61

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 105.36α = 90
b = 105.36β = 90
c = 107.78γ = 120
Symmetry
Space GroupH 3 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 3152009-06-03MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X251.1051NSLSX25

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Sym I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.77529.05999.80.1234.0585.658655854
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.7752.9499.90.011.0010.75.7852

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONSADTHROUGHOUT2.79229.059584766599.690.2560.2520.292RANDOM78.29
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
0.980.490.98-1.46
RMS Deviations
KeyRefinement Restraint Deviation
r_angle_refined_deg0.97
r_scangle_it0.489
r_scbond_it0.281
r_mcangle_it0.071
r_chiral_restr0.042
r_mcbond_it0.023
r_bond_refined_d0.005
r_gen_planes_refined0.002
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms1080
Solvent Atoms
Heterogen Atoms26

Software

Software
Software NamePurpose
SCALAdata scaling
PHASERphasing
RESOLVEphasing
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling