X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Sitting Drop
pH 7.6
Temperature 277.0
Details THE PROTEIN SOLUTION CONTAINING 23.3 MG/ML OF PURIFIED NARL, 20 MM TRIS.HCL (PH=7.6), 0.5 MM MGCL2, AND 10% GLYCEROL WAS MIXED WITH AN EQUAL VOLUME OF THE RESERVOIR SOLUTION CONTAINING 0.1 M TRIS.HCL (PH=8.5), 0.2 M SODIUM ACETATE, AND 30% POLYETHYLENE GLYCOL (PEG) 4000. SITTING DROPS CONTAINING 20 ML OF MIXTURE WERE EQUILIBRATED BY VAPOR DIFFUSION AT 4 DEGREES AGAINST 20 ML OF THE RESERVOIR SOLUTION. CRYSTALS BEGAN TO APPEAR AS CLUSTERS OF PLATES AFTER 11-15 DAYS., vapor diffusion - sitting drop, temperature 277K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 156.31 α = 90
b = 38.53 β = 131.91
c = 106.89 γ = 90
Symmetry
Space Group C 1 2 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 93
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RIGAKU -- 1995-07-27
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU -- -- --

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
2.2 65 99.87 0.078 0.078 -- 5.4 -- 22871 -- 0.0 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)
2.2 2.44 99.3 -- -- -- -- --

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 2.2 8.0 -- 0.0 -- 22321 -- 99.0 -- 0.211 0.211 0.267 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 20.0
RMS Deviations
Key Refinement Restraint Deviation
x_bond_d 0.009
x_angle_deg 1.36
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3174
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 361

Software

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