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 60 MINUTES AT -20 DEGREES. UNDER THESE CONDITIONS THE ENZYME UNDERGO A COMPLETE TURNOVER AND THE STRUCTURE REPRESENTS THE REOXIDISED ENZYME

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 106.82 α = 90
b = 60.97 β = 112.24
c = 100.33 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 -- 1998-12-16
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON ESRF BEAMLINE ID14-3 -- ESRF ID14-3

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
1.46 30 91.9 0.05 0.05 -- 2.1 -- 189123 -- 0.0 15.7
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)
1.46 1.52 84.6 0.199 0.199 2.5 -- --

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 1.46 30.0 -- 0.0 -- 189123 -- 91.2 -- -- 0.195 0.215 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 17.8
RMS Deviations
Key Refinement Restraint Deviation
p_special_tor 15.0
p_transverse_tor 30.1
p_staggered_tor 10.5
p_planar_tor 4.3
p_xyhbond_nbd 0.139
p_multtor_nbd 0.211
p_bond_d 0.013
p_angle_d 0.013
p_planar_d 0.017
p_plane_restr 0.023
p_chiral_restr 0.114
p_singtor_nbd 0.3
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 8690
Nucleic Acid Atoms 0
Heterogen Atoms 233
Solvent Atoms 891

Software

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