X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 9
Details PROTEIN SOLUTION (4MG/ML IN 20MM TRIS-HCL PH 7.5, 50MM NACL) WAS INCUBATED WITH 5MM INHIBITOR FOR 30MINS PRIOR TO SETTING UP CRYSTALLISATION TRIALS. THE CRYSTALLISATION DROPS CONTAINED A 1:1 MIXTURE OF COMPLEX SOLUTION AND RESERVOIR BUFFER (2.6 - 2.8 M NACL, 0.1 M HEPES PH 9.0).

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 56.52 α = 90
b = 56.52 β = 90
c = 263.76 γ = 90
Symmetry
Space Group P 41 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 298
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD ADSC CCD SILICON MIRROR 2000-08-22
Diffraction Radiation
Monochromator Protocol
SI(III) 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
2.1 36.3 70.0 0.147 0.147 -- 2.7 -- 18276 -- -- 14.1
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)
2.1 2.27 40.0 0.385 0.385 2.5 1.7 --

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 2.1 36.3 -- 0.0 -- 18276 1439 69.9 -- -- 0.212 0.256 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 2.18 -- 52 696 0.266 0.288 0.04 29.0
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 22.0
Anisotropic B[1][1] -4.81
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] -4.81
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] 9.61
RMS Deviations
Key Refinement Restraint Deviation
c_scangle_it 1.78
c_mcangle_it 1.14
c_scbond_it 1.49
c_mcbond_it 0.88
c_dihedral_angle_d 23.0
c_improper_angle_d 0.83
c_bond_d 0.006
c_angle_deg 1.1
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.27
Luzzati Sigma A (Observed) 0.24
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.32
Luzzati Sigma A (R-Free Set) 0.25
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2504
Nucleic Acid Atoms 0
Heterogen Atoms 56
Solvent Atoms 184

Software

Software
Software Name Purpose
CNX refinement version: 2000
MOSFLM data reduction
SCALA data scaling
AMoRE phasing