X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 4
Details A 28 BP DNA DUPLEX (10MG/ML) WAS ADDED TO THE PROTEIN IN A 1:2 MOLAR RATIO. CRYSTALS WERE GROWN BY VAPOR DIFFUSION USING HANGING DROPS OF 1 UL. OF PROTEIN/DNA SOLUTION MIXED 1 UL. OF RESERVOIR SOLUTION. THE BEST CRYSTALS WERE OBTAINED WITH RESERVOIRS CONTAINING 400-600 MM PHOSPHORIC ACID ADJUSTED TO PH 4.0 - 4.3 WITH TRIETHYLAMINE., pH 4.00, vapor diffusion - hanging drop

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 42.5 α = 76.7
b = 50.1 β = 79.3
c = 55.8 γ = 67.2
Symmetry
Space Group P 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 111
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE FUJI DUAL SLITS 1994-08
Diffraction Radiation
Monochromator Protocol
SILICON SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON CHESS BEAMLINE F2 -- CHESS F2

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
2.7 25 87.2 0.058 5.8 -- 2.5 -- 10021 -- 2.0 --
High Resolution Shell
Resolution (High) Resolution (Low) Percent Possible (All) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All)
2.7 2.8 73.0 0.189 18.9 7.0 2.2 --

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
MAD 2.3 6.0 -- 2.0 -- 14575 -- 84.7 -- -- 0.23 0.302 RANDOM
RMS Deviations
Key Refinement Restraint Deviation
x_bond_d 0.013
x_angle_deg 1.71
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2653
Nucleic Acid Atoms 1094
Heterogen Atoms 0
Solvent Atoms 528

Software

Software
Software Name Purpose
PHASIT model building
X-PLOR refinement version: 3.1F
DENZO data reduction
SCALEPACK data scaling
PHASIT phasing