X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6.5
Details 30% (W/V) PEG 2000 MONOMETHYLETHER, 50 MM MES, 100 MM SODIUM CITRATE, 200 MM AMMONIUM ACETATE, 5 MM IRON(II) SULPHATE, 10 MM POTASSIUM ALPHA-KETOGLUTARATE, 10 MM SODIUM ASCORBATE, PH 6.5, ANAEROBIC (AR ATMOSPHERE, < 0.5 PPM OXYGEN)

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 61.07 α = 90
b = 72.99 β = 90
c = 87.43 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
CCD MARRESEARCH MIRRORS 2000-09-15
Diffraction Radiation
Monochromator Protocol
SI MAD
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON ESRF BEAMLINE BM14 0.91841,0.97855,0.97885 ESRF BM14

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 36.5 99.9 0.063 -- -- 5.4 -- 23462 -- -- 27.3
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)
2.1 2.21 100.0 0.251 -- 2.8 -- --

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
MAD 2.1 20.0 -- 0.0 -- 23357 964 99.7 -- 0.195 0.195 0.233 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 2.1 2.23 -- 146 3699 0.192 0.245 0.02 99.8
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 26.9
Anisotropic B[1][1] 0.085
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] -5.614
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] 5.528
RMS Deviations
Key Refinement Restraint Deviation
c_scangle_it 3.173
c_scbond_it 2.035
c_mcangle_it 2.202
c_mcbond_it 1.313
c_improper_angle_d 0.81
c_bond_d 0.0052
c_angle_deg 1.32
c_dihedral_angle_d 22.5
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.23
Luzzati Sigma A (Observed) 0.1
Luzzati Resolution Cutoff (Low) 20.0
Luzzati ESD (R-Free Set) 0.29
Luzzati Sigma A (R-Free Set) 0.18
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2708
Nucleic Acid Atoms 0
Heterogen Atoms 22
Solvent Atoms 288

Software

Computing
Computing Package Purpose
MOSFLM Data Reduction (intensity integration)
CCP4 (SCALA) Data Reduction (data scaling)
SOLVE Structure Solution
CNS 1.1 Structure Refinement
Software
Software Name Purpose
CNS version: 1.1 refinement
SOLVE model building