X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 9
Details HANGING DROP USING 2.1 M AMMONIUM SULPHATE AND 100 MM CHES PH 7.0 1 MM ASCORBATE AND 2.5 UM PMS FROM REDUCTION OF PROTEIN WAS ALSO PRESENT IN CRYSTALLISATION. CRYSTALS WERE GROWN UNDER STRICTLY ANAEROBIC CONDITIONS. THE ENZYME WAS OXIDISED IN THE CRYSTAL BY ALLOWING AIR TO DIFFUSE INTO THE DROP

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 128.3 α = 90
b = 128.3 β = 90
c = 264.83 γ = 90
Symmetry
Space Group P 43 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH -- 2000-10-05
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON MAX II BEAMLINE I711 -- MAX II I711

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
2.5 30 98.1 0.062 0.062 -- 3.1 -- 74676 -- 0.0 35.6
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)
2.5 2.59 91.2 0.28 0.28 3.9 -- --

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 2.5 30.0 -- 0.0 -- 74676 -- 98.1 -- -- 0.226 0.258 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 39.7
RMS Deviations
Key Refinement Restraint Deviation
p_special_tor 15.0
p_transverse_tor 32.9
p_staggered_tor 12.9
p_planar_tor 1.9
p_xyhbond_nbd 0.173
p_multtor_nbd 0.261
p_bond_d 0.013
p_angle_d 0.017
p_planar_d 0.019
p_plane_restr 0.0041
p_chiral_restr 0.14
p_singtor_nbd 0.186
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 8204
Nucleic Acid Atoms 0
Heterogen Atoms 204
Solvent Atoms 349

Software

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