4R45

Racemic crystal structure of a bimolecular DNA G-quadruplex (P-1)


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2HBNPDB ENTRY 2HBN

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP6.62851 mM DNA, 50 mM potassium cacodylate, 40 mM potassium chloride, 50 mM magnesium chloride hexahydrate, 2.5 mM spermine, 5% v/v MPD, pH 6.6, VAPOR DIFFUSION, HANGING DROP, temperature 285K
Crystal Properties
Matthews coefficientSolvent content
2.0539.94

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 27.646α = 104.5
b = 28.3β = 94.19
c = 45.719γ = 113.42
Symmetry
Space GroupP -1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELDECTRIS PILATUS 200K2013-12-23MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU1.5418

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge 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
11.925.0294.890.06287.811.7949790112249.29
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.91.9795.660.12272.661.5909

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 2HBN1.925.029075859941294.750.287970.285620.34003RANDOM14.068
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]
-0.06-0.020.060.030.01
RMS Deviations
KeyRefinement Restraint Deviation
r_long_range_B_refined4.991
r_long_range_B_other4.348
r_angle_other_deg1.652
r_angle_refined_deg1.049
r_scangle_other1.02
r_scbond_it0.619
r_scbond_other0.619
r_chiral_restr0.075
r_gen_planes_refined0.014
r_bond_refined_d0.007
RMS Deviations
KeyRefinement Restraint Deviation
r_long_range_B_refined4.991
r_long_range_B_other4.348
r_angle_other_deg1.652
r_angle_refined_deg1.049
r_scangle_other1.02
r_scbond_it0.619
r_scbond_other0.619
r_chiral_restr0.075
r_gen_planes_refined0.014
r_bond_refined_d0.007
r_bond_other_d0.003
r_gen_planes_other0.002
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms506
Solvent Atoms143
Heterogen Atoms5

Software

Software
Software NamePurpose
CrystalCleardata collection
PHASERphasing
REFMACrefinement
CrystalCleardata reduction
CrystalCleardata scaling