223D

DIRECT OBSERVATION OF TWO BASE-PAIRING MODES OF A CYTOSINE-THYMINE ANALOGUE WITH GUANINE IN A DNA Z-FORM DUPLEX: SIGNIFICANCE FOR BASE ANALOGUE MUTAGENESIS


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION6.5277pH 6.50, VAPOR DIFFUSION, temperature 277.00K
Crystal Properties
Matthew coefficientSolvent content
1.6525.44

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 18.23α = 90
b = 30.63β = 90
c = 43.78γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray292DIFFRACTOMETERRIGAKU AFC-5R
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RU200

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTZDF0021.78427981000.179
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]
RMS Deviations
KeyRefinement Restraint Deviation
n_phos_bond_it10.38
n_phos_angle_it7.71
n_sugar_angle_it5.74
n_sugar_bond_it4.79
n_multtor_nbd0.278
n_singtor_nbd0.145
n_chiral_restr0.138
n_sugar_bond_angle_d0.076
n_phos_bond_d0.071
n_phos_bond_angle_d0.048
RMS Deviations
KeyRefinement Restraint Deviation
n_phos_bond_it10.38
n_phos_angle_it7.71
n_sugar_angle_it5.74
n_sugar_bond_it4.79
n_multtor_nbd0.278
n_singtor_nbd0.145
n_chiral_restr0.138
n_sugar_bond_angle_d0.076
n_phos_bond_d0.071
n_phos_bond_angle_d0.048
n_plane_restr0.044
n_sugar_bond_d0.041
n_impr_tor
n_bond_d
n_bond_angle_restr
n_dihedral_angle_restr
n_angle_d
n_planar_d
n_hb_or_metal_coord
n_xhyhbond_nbd
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms240
Solvent Atoms51
Heterogen Atoms6

Software

Software
Software NamePurpose
MERLOTphasing
NUCLSQrefinement