1V9G

Neutron Crystallographic analysis of the Z-DNA hexamer CGCGCG


NEUTRON DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1IOTPDB ENTRY 1IOT

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1SMALL TUBES7328MPD, sodium cacodylate, magnesium chloride, spermine, pH 7.0, SMALL TUBES, temperature 328K
Crystal Properties
Matthews coefficientSolvent content
1.357.98

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 18.46α = 90
b = 30.76β = 90
c = 43.18γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11neutron298DIFFRACTOMETERBIX-3M2003-06-10MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1NUCLEAR REACTORJRR-3M BEAMLINE 1G-A2.88JRR-3M1G-A

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
11.65073.70.1276.22262726273.9
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)
11.61.6640.90.2083.51.7142

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)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
NEUTRON DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 1IOT1.825.0532510182116372.50.2560.2290.2220.294RANDOM12.09
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]
1.2891.581-2.87
RMS Deviations
KeyRefinement Restraint Deviation
c_angle_deg0.83
c_improper_angle_d0.82
c_dihedral_angle_d0.43
c_bond_d0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms240
Solvent Atoms44
Heterogen Atoms14

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing