X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 6.5
Details EQUAL VOLUMES OF THE PROTEIN SOLUTION (10 MG/ML) BUFFERED WITH 50 MM PIPES PH 6.5 AND THE PRECIPITANT (30% PEG 4000, 0.2 M AMMONIUM SULFATE, 2 MM DTT) WERE MIXED AND EQUILIBRATED (IN THE HANGING DROP SETUP) AGAINST THE PRECIPITANT., vapor diffusion - hanging drop

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 48.68 α = 90
b = 48.68 β = 90
c = 153.22 γ = 120
Symmetry
Space Group P 32 2 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MAR scanner 345 mm plate COLLIMATOR 1997-09
Diffraction Radiation
Monochromator Protocol
SI(111) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON NSLS BEAMLINE X9B -- NSLS X9B

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
1.46 22 99.8 -- 0.034 -- 7.53 -- 37511 -- -3.0 --
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)
1.46 1.51 99.2 -- 0.11 8.5 5.5 --

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
SIRAS (USING MAD X-RAY DATA) 1.46 8.0 -- 2.0 -- 36895 3785 97.6 -- 0.187 0.187 0.225 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 1.46 1.53 -- 449 3906 0.221 0.226 0.011 --
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 16.1
RMS Deviations
Key Refinement Restraint Deviation
x_mcangle_it 2.07
x_improper_angle_d 1.265
x_angle_deg 1.584
x_dihedral_angle_d 27.01
x_scangle_it 2.07
x_mcbond_it 2.34
x_bond_d 0.009
x_scbond_it 2.34
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1890
Nucleic Acid Atoms 0
Heterogen Atoms 20
Solvent Atoms 312

Software

Software
Software Name Purpose
DENZO data reduction
SCALEPACK data scaling
SHELX-97 model building
SHELX-97 refinement
X-PLOR refinement version: 3.1
SHELX-97 phasing