2QBZ

Structure of the M-Box Riboswitch Aptamer Domain


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.4293HEPES, MPD, Spermine, KCl, MgCl2 over 35 % MPD, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K
2VAPOR DIFFUSION, HANGING DROP7.2293HEPES, MPD, Spermine, CsCl, MgCl2 over 35 % MPD, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 48.655α = 90
b = 101.081β = 90
c = 285.765γ = 90
Symmetry
Space GroupI 2 2 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 3152006-04-17MSINGLE WAVELENGTH
21x-ray100IMAGE PLATERIGAKU RAXIS IVosmic mirrors2006-06-17MSINGLE WAVELENGTH
1,21
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 19-ID0.9786APS19-ID
2ROTATING ANODERIGAKU FR-E+ SUPERBRIGHT1.5418

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (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
1,22.65099.30.1070.1076.84.4225842258459.6
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)
1,22.62.6998.70.4050.40134.52202

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONSIRASTHROUGHOUT2.647.672218122181113199.370.2040.2040.2020.246RANDOM39.551
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]
-3.83-1.645.47
RMS Deviations
KeyRefinement Restraint Deviation
r_mcbond_it1.8
r_angle_refined_deg1.73
r_scangle_it1.603
r_scbond_it1.126
r_symmetry_hbond_refined0.332
r_nbtor_refined0.279
r_symmetry_vdw_refined0.22
r_nbd_refined0.199
r_xyhbond_nbd_refined0.17
r_metal_ion_refined0.088
RMS Deviations
KeyRefinement Restraint Deviation
r_mcbond_it1.8
r_angle_refined_deg1.73
r_scangle_it1.603
r_scbond_it1.126
r_symmetry_hbond_refined0.332
r_nbtor_refined0.279
r_symmetry_vdw_refined0.22
r_nbd_refined0.199
r_xyhbond_nbd_refined0.17
r_metal_ion_refined0.088
r_chiral_restr0.08
r_bond_refined_d0.01
r_gen_planes_refined0.008
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms3263
Solvent Atoms135
Heterogen Atoms10

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing
DMphasing
REFMACrefinement
PDB_EXTRACTdata extraction
SBC-Collectdata collection
HKL-2000data reduction
HKL-2000data scaling