X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7
Details AN EQUAL AMOUNT OF PROTEIN SOLUTION (8 MG/ML PROTEIN IN 10 MM TRIS 140 MM NACL 1MM CACL2 0.02% (W/V) NAN3 PH 7.5) AND PRECIPITANT BUFFER (10-20% (W/V) PEG 20000 IN 100 MM TRIS PH 6-8) WERE MIXED AND VAPOR EQUILIBRATED AGAINST THE LATTER., pH 7.00

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 55.96 α = 90
b = 109.72 β = 92.2
c = 56.09 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 298
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH -- 1998-02-15
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE -- -- -- --

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
2.3 20 95.0 0.063 -- -- 2.45 -- 28571 -- -- 40.3
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)
2.3 2.38 90.6 0.29 -- -- -- --

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 2.3 20.0 -- 0.0 -- 28550 -- 95.0 -- 0.209 0.209 0.271 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 28.6
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.9
x_bond_d 0.01
x_angle_deg 2.5
x_dihedral_angle_d 24.2
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3450
Nucleic Acid Atoms 0
Heterogen Atoms 9
Solvent Atoms 192

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
AMORE VERSION FOR CCP4 Structure Solution
X-PLOR Structure Refinement
Software
Software Name Purpose
X-PLOR refinement
CCP4 version: VERSION OF AMORE model building
SCALEPACK data reduction
DENZO data collection