122D

DNA HELIX STRUCTURE AND REFINEMENT ALGORITHM: COMPARISON OF MODELS FOR D(CCAGGCM==5==CTGG) DERIVED FROM NUCLSQ, TNT, AND X-PLOR


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Microdialysis
pH 7.5
Temperature 277.0
Details pH 7.50, MICRODIALYSIS, temperature 277.00K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 53.77 α = 90
b = 53.77 β = 90
c = 34.35 γ = 120
Symmetry
Space Group P 6

Diffraction

Diffraction Detector
Detector Diffraction Type Details Collection Date
DIFFRACTOMETER ENRAF-NONIUS CAD4 -- --
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE -- -- -- --

Data Collection

Overall
Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) R Sym I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot
1.75 -- -- -- -- -- -- 7209 4704 -- -- --

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
-- 1.7 8.0 -- 2.0 -- 3799 -- -- -- 0.206 -- -- --
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 0
Nucleic Acid Atoms 406
Heterogen Atoms 0
Solvent Atoms 37

Software

Computing
Computing Package Purpose
TNT Structure Refinement
Software
Software Name Purpose
TNT refinement