X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.5
Details 50% SATURATED AMMONIUM SULFATE, 0.1 M TRIS PH 7.5, 0.1 M KCL

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 89.62 α = 90
b = 89.62 β = 90
c = 141.28 γ = 120
Symmetry
Space Group P 61

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 173
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE FUJI -- 1994-10-04
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON NSLS BEAMLINE X25 -- NSLS X25

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
2.1 20 98.8 0.079 -- -- 3.2 -- 36912 -- -- 43.5
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)
2.2 2.33 98.6 0.237 -- 4.5 3.0 --

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
MULTIPLE ISOMORPHOUS REPLACEMENT 2.2 6.0 -- 0.0 -- 30707 3147 99.1 -- 0.218 0.218 0.3 RANDOM
High Resolution Shell
Refinement method Shell Resolution (High) Shell Resolution (Low) # of Reflections (Observed) # of Reflections (R-Free) # of Reflections (R-Work) R-Factor (R-Work) R-Factor (R-Free) R-Factor (R-Free Error) Percent Reflections (Observed)
X Ray Diffraction 2.2 2.33 -- 521 4529 0.365 0.398 0.017 98.6
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 43.0
RMS Deviations
Key Refinement Restraint Deviation
x_bond_d 0.014
x_angle_deg 1.8
x_scbond_it 5.38
x_scangle_it 8.3
x_improper_angle_d 1.69
x_mcangle_it 4.69
x_dihedral_angle_d 25.5
x_mcbond_it 3.01
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.31
Luzzati Sigma A (Observed) 0.41
Luzzati Resolution Cutoff (Low) 6.0
Luzzati ESD (R-Free Set) 0.39
Luzzati Sigma A (R-Free Set) 0.41
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2854
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 268

Software

Software
Software Name Purpose
DENZO data reduction
SCALEPACK data scaling
SHELXL-96 model building
X-PLOR refinement version: 3.843
SHELXL-96 phasing