X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.9
Details 100 MM IMIDAZOLE/MALEATE, PH 7.9, 1%-4% SATURATED NACL, 1%-4% SATURATED AMMONIUM SULFATE, 16%-20% PEG 4000, MIXED WITH EQUAL VOLUMES 30 MG/ML PROTEIN.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 47.76 α = 90
b = 55.27 β = 90
c = 84.97 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 275
Diffraction Detector
Detector Diffraction Type Details Collection Date
-- -- -- 1995-02
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON SSRL BEAMLINE BL7-1 -- SSRL BL7-1

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
1.57 50 94.5 0.046 -- -- 4.0 -- 30433 -- 0.0 --
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)
1.57 1.61 93.4 0.106 -- 11.0 -- --

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
MULTIPLE ISOMORPHOUS REPLACEMENT 1.57 20.0 -- 0.0 -- 30381 3048 94.5 -- 0.189 0.189 0.224 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 1.57 1.64 -- 390 3319 0.318 0.286 -- 93.7
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Anisotropic B[1][1] 4.9022
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 0.7885
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -5.6908
RMS Deviations
Key Refinement Restraint Deviation
x_scangle_it 2.812
x_scbond_it 1.746
x_mcangle_it 1.649
x_mcbond_it 0.958
x_improper_angle_d 0.949
x_bond_d 0.009
x_angle_deg 1.154
x_dihedral_angle_d 23.96
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1808
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 185

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
PHASES, SQUASH, XTALVIEW Structure Solution
X-PLOR 3.8 Structure Refinement
Software
Software Name Purpose
X-PLOR version: 3.8 refinement
XTALVIEW model building
SQUASH model building
PHASES model building