X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 9
Details 1.2 M AMMONIUM SULFATE 0.01 M CALCIUM CHLORIDE 0.1 M TRIS-HCL BUFFER, PH 9.0 0.003 M SODIUM AZIDE

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 121.66 α = 90
b = 80.8 β = 116.65
c = 72.64 γ = 90
Symmetry
Space Group C 1 2 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 113
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD PRINCETON 2K -- 1995-04-03
Diffraction Radiation
Monochromator Protocol
SI(111) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON CHESS BEAMLINE A1 -- CHESS A1

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 22 88.3 -- 0.053 -- 2.3 -- 37605 -- 2.0 26.08
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)
2.0 2.07 63.6 -- 0.146 -- 1.59 --

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
THE INITIAL MODEL WAS OBTAINED FROM A COMBINATION OF MULTI-WAVELENGTH ANOMALOUS DIFFRACTION (MAD) AND REAL SPACE AVERAGING TECHNIQUES. THE MAD DATA WAS TAKEN AT THE MERCURY L(III) EDGE AT 3 DIFFERENT WAVELENGTHS (CHESS BEAMLINE F2). REAL SPACE AVERAGING WAS USED TO IMPROVE THE MAPS. 2.0 5.0 -- 2.0 -- 33174 3333 -- -- 0.206 0.206 0.262 --
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 2.0 2.07 -- 209 1961 0.257 0.256 -- 54.6
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 29.89
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.198
x_bond_d 0.006
x_angle_deg 1.375
x_dihedral_angle_d 26.96
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3226
Nucleic Acid Atoms 0
Heterogen Atoms 8
Solvent Atoms 249

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
PHASES Structure Solution
X-PLOR 3.1 Structure Refinement
Software
Software Name Purpose
X-PLOR version: 3.1 refinement
PHASES model building