1FQ2

CRYSTAL STRUCTURE ANALYSIS OF THE POTASSIUM FORM OF B-DNA DODECAMER CGCGAATTCGCG


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP6.5295MgCl2, Potassium Cacodylate, Spermine, MPD, DNA. pH 6.5, VAPOR DIFFUSION, SITTING DROP at 295K, VAPOR DIFFUSION, SITTING DROP
Crystal Properties
Matthews coefficientSolvent content
2.2845.97

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 25.588α = 90
b = 40.818β = 90
c = 66.673γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100AREA DETECTORMSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X26CNSLSX26C

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
11.21019368

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 DIFFRACTIONAB INITIOFREE R1.21019368193681933860.13920.1410.215RANDOM
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]
Coordinate Error
Structure Solution MethodRefinement High ResolutionRefinement Low Resolution
272678
RMS Deviations
KeyRefinement Restraint Deviation
s_angle_d0.037
s_from_restr_planes0.0232
s_bond_d0.016
s_non_zero_chiral_vol0.015
s_similar_dist
s_zero_chiral_vol
s_anti_bump_dis_restr
s_rigid_bond_adp_cmpnt
s_similar_adp_cmpnt
s_approx_iso_adps
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms486
Solvent Atoms181
Heterogen Atoms14

Software

Software
Software NamePurpose
SHELXSphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling