X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7
Details 2.3 M AMMONIUM SULFATE 50MM POTASSIUM PHOSPHATE PH 7.0 CRYSTALS WERE REDUCED USING 20MM SODIUM DITHIONITE. THE CRYSTAL WAS TRANSFERRED TO A SOLUTION CONTAINING 2.3 M AMMONIUM SULFATE, 50 MM PHOSPAHTE BUFFER PH 7 AND 15 % GLYCEROL. O2 WAS INTRODUCED UNDER 15 ATM PRESSURE FOR 2 MINUTES AT -20 DEGREES. THE DATA SET IS COMPOSED 10 DEGREE WEDGES OF DATA FROM 11 IDENTICAL CRYSTALS.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 107.19 α = 90
b = 61.17 β = 112.19
c = 100.52 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD MARRESEARCH -- 1999-11-29
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON ESRF BEAMLINE ID14-2 -- ESRF ID14-2

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
1.6 30 85.3 0.046 0.046 -- 2.1 -- 135637 -- 0.0 17.714
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)
1.6 1.66 85.4 0.175 0.175 2.9 -- --

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
MOLECULAR REPLACEMENT 1.6 30.0 -- 0.0 -- 135637 -- 85.3 -- -- 0.196 0.219 RANDOM
RMS Deviations
Key Refinement Restraint Deviation
p_special_tor 15.0
p_transverse_tor 29.4
p_staggered_tor 11.2
p_planar_tor 4.5
p_xyhbond_nbd 0.149
p_multtor_nbd 0.241
p_bond_d 0.014
p_angle_d 0.014
p_planar_d 0.018
p_plane_restr 0.024
p_chiral_restr 0.127
p_singtor_nbd 0.179
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 8445
Nucleic Acid Atoms 0
Heterogen Atoms 213
Solvent Atoms 795

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
REFMAC Structure Refinement
Software
Software Name Purpose
REFMAC refinement