X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6.5
Details 18% (W/V) PEG 2000 MONOMETHYLETHER, 50 MM MES, 200 MM AMMONIUM ACETATE, 2 MM IRON(II) SULPHATE, 10 MM POTASSIUM ALPHA-KETOGLUTARATE, 10 MM SODIUM ASCORBATE 10 MM DHQ (IN MEOH TO GIVE A FINAL CONC. OF 10%(V/V) MEOH), PH 6.5, ANAEROBIC (AR ATMOSPHERE, < 0.5 PPM OXYGEN)

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 61.26 α = 90
b = 72.39 β = 90
c = 87.05 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 ADSC MIRRORS 2001-05-15
Diffraction Radiation
Monochromator Protocol
SI 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
1.75 25 99.9 0.068 -- -- 3.8 -- 39711 -- -- 20.0
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)
1.75 1.8 99.9 0.274 -- 4.1 3.8 --

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
MOLECULAR REPLACEMENT 1.75 25.0 -- 0.0 -- 39703 1626 99.8 -- 0.194 0.194 0.222 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 1.75 1.86 -- 252 6277 0.244 0.304 0.019 99.9
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 23.3
Anisotropic B[1][1] -2.92
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 8.81
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -5.89
RMS Deviations
Key Refinement Restraint Deviation
c_scangle_it 3.04
c_scbond_it 2.1
c_mcangle_it 1.9
c_mcbond_it 1.25
c_improper_angle_d 1.07
c_bond_d 0.013
c_angle_deg 1.6
c_dihedral_angle_d 22.8
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.2
Luzzati Sigma A (Observed) 0.14
Luzzati Resolution Cutoff (Low) 25.0
Luzzati ESD (R-Free Set) 0.24
Luzzati Sigma A (R-Free Set) 0.2
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2752
Nucleic Acid Atoms 0
Heterogen Atoms 77
Solvent Atoms 357

Software

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