X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6.5
Details 20% (W/V) PEG 4000, 0.2 M CALCIUM ACETATE, 0.1 M CACODYLATE BUFFER, PH 6.5 THE FERROUS STATE WAS FORMED BY SOAKING THE CRYSTALS FOR 30 MINUTES IN A RESERVOIR SOLUTION SUPPLEMENTED WITH 100 MM SODIUM DITHIONITE AND PEG400 BEFORE FLASH FREEZING

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 40.27 α = 90
b = 67.09 β = 90
c = 117.52 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
MAR345 IMAGE PLATE MARRESEARCH MIRRORS 2000-05-15
Diffraction Radiation
Monochromator Protocol
SI(111) 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
1.7 25.9 97.7 0.065 -- -- 3.4 -- 34886 -- -- 13.1
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)
1.7 1.79 97.7 0.156 -- 6.6 -- --

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
OTHER 1.7 25.9 -- 0.0 -- 34886 1775 97.1 -- 0.171 0.171 0.2 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 1.6 1.7 -- -- 5 0.178 -- -- 0.1
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 13.4
Anisotropic B[1][1] 0.29
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 1.21
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -1.5
RMS Deviations
Key Refinement Restraint Deviation
c_scangle_it 2.33
c_scbond_it 1.65
c_mcangle_it 1.33
c_mcbond_it 0.94
c_improper_angle_d 1.09
c_bond_d 0.022
c_angle_deg 1.4
c_dihedral_angle_d 21.3
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.15
Luzzati Sigma A (Observed) 0.07
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.18
Luzzati Sigma A (R-Free Set) 0.09
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2369
Nucleic Acid Atoms 0
Heterogen Atoms 49
Solvent Atoms 423

Software

Computing
Computing Package Purpose
MOSFLM Data Reduction (intensity integration)
CCP4 (SCALA) Data Reduction (data scaling)
CNS Structure Solution
CNS 1.0 Structure Refinement
Software
Software Name Purpose
CNS version: 1.0 refinement
CNS model building