X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7
Details HANGING DROP AT 20 DEGREES C. 100 MM HEPES-NAOH, PH 7.0, 3% (W/V) GLYCEROL, 5 MM 2-OXO-3-METHYLBUTANOATE, 1.5-1.7 M AMMONIUM SULPHATE. CRYSTALS SOAKED IN 5 MM IRON(II) SULPHATE IN MOTHER LIQUOR UNDER ANAEROBIC CONDITIONS BEFORE DATA COLLECTION.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 107.1 α = 90
b = 107.1 β = 90
c = 70.86 γ = 120
Symmetry
Space Group H 3

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD ADSC QUANTUM 4 -- 1999-05-11
Diffraction Radiation
Monochromator Protocol
SILICON 111 SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON SRS BEAMLINE PX9.6 -- SRS PX9.6

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
1.5 100 88.8 0.057 -- -- 2.9 -- 38283 -- 1.4 22.9
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)
1.5 1.51 90.9 0.542 -- 1.4 2.4 --

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 1.5 19.4 -- 0.0 -- 41654 1719 85.7 -- 0.225 0.225 0.241 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 1.5 1.59 -- 279 6113 0.324 0.35 0.021 79.2
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 25.6
Anisotropic B[1][1] -1.59
Anisotropic B[1][2] -0.3
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] -1.59
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] 3.17
RMS Deviations
Key Refinement Restraint Deviation
c_bond_d 0.023
c_improper_angle_d 0.72
c_dihedral_angle_d 22.9
c_angle_deg 1.2
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.21
Luzzati Sigma A (Observed) 0.19
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.23
Luzzati Sigma A (R-Free Set) 0.18
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2077
Nucleic Acid Atoms 0
Heterogen Atoms 9
Solvent Atoms 194

Software

Software
Software Name Purpose
CNS refinement version: 0.9
MOSFLM data reduction
SCALA data scaling
CNS phasing