X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.8
Details 1.8 M AMMONIUM SULFATE PH 7.8., SMALL AMOUNTS OF SOLID SODIUM BENZOATE

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 124.87 α = 90
b = 124.87 β = 90
c = 124.87 γ = 90
Symmetry
Space Group P 21 3

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 90
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH MIRROR 1997-01
Diffraction Radiation
Monochromator Protocol
SI(111) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON MPG/DESY, HAMBURG BEAMLINE BW6 -- MPG/DESY, HAMBURG BW6

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 28 98.9 0.076 -- -- 4.7 -- 84499 -- 0.0 13.49
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 1.67 97.9 0.18 -- 9.0 4.0 --

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 90.0 -- 0.0 -- 84499 4229 98.9 -- 0.149 0.152 0.171 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 13.25
RMS Deviations
Key Refinement Restraint Deviation
p_special_tor 0.0
p_transverse_tor 30.4
p_staggered_tor 11.9
p_planar_tor 4.1
p_xyhbond_nbd 0.093
p_multtor_nbd 0.25
p_bond_d 0.012
p_angle_d 0.026
p_planar_d 0.031
p_mcbond_it 1.07
p_mcangle_it 1.57
p_scbond_it 1.69
p_scangle_it 1.42
p_plane_restr 0.022
p_chiral_restr 0.131
p_singtor_nbd 0.169
Coordinate Error
Parameter Value
Luzzati Sigma A (Observed) 0.02
Luzzati Resolution Cutoff (Low) 10.0
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 4290
Nucleic Acid Atoms 0
Heterogen Atoms 43
Solvent Atoms 671

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
CCP4 Structure Solution
REFMAC Structure Refinement
Software
Software Name Purpose
REFMAC refinement
CCP4 model building