X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6
Temperature 277.0
Details 35-40% (W/V) PEG-200 0.15 M MES BUFFER PH 6, 0.05 M NACL, 4 DEG C , temperature 277.0K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 111.39 α = 90
b = 111.39 β = 90
c = 136.62 γ = 120
Symmetry
Space Group P 31 2 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD BRANDEIS - B4 -- 1997-07-01
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON NSLS BEAMLINE X12C -- NSLS X12C

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
2.6 30 97.4 -- 0.09 -- 6.7 -- 30011 -- -- 40.2
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)
2.6 2.69 99.3 -- 0.17 2.2 -- --

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 2.6 30.0 -- 0.0 -- 28531 1497 93.2 -- -- 0.186 0.247 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 2.6 2.76 -- 288 4624 0.224 0.29 0.017 98.0
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 32.5
Anisotropic B[1][1] 8.48
Anisotropic B[1][2] 8.97
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 8.48
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -16.9
RMS Deviations
Key Refinement Restraint Deviation
x_mcbond_it 2.27
x_scangle_it 5.34
x_angle_deg 2.0
x_bond_d 0.019
x_improper_angle_d 1.29
x_mcangle_it 3.4
x_scbond_it 4.01
x_dihedral_angle_d 24.2
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.26
Luzzati Sigma A (Observed) 0.26
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.36
Luzzati Sigma A (R-Free Set) 0.33
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 4244
Nucleic Acid Atoms 0
Heterogen Atoms 32
Solvent Atoms 220

Software

Software
Software Name Purpose
DENZO data reduction
SCALEPACK data scaling
CNS refinement
CNS phasing