X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Slow Cooling
pH 8.5
Temperature 298.0
Details 30 mg insulin, 3.0 ml of 0.02 M HCl, 0.3 ml of 0.15 M Zinc Acetate, 1.5 ml of 0.2 M Sodium Citrate, 1.2 ml of 2.5% m-cresol in acetone, 0.36 gm sodium chloride, pH 8.5, SLOW COOLING, temperature 298K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 78.87 α = 90
b = 78.87 β = 90
c = 39.47 γ = 120
Symmetry
Space Group H 3

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RIGAKU RAXIS IV OSMIC CONFOCAL MIRRORS 2000-01-13
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RU200 -- -- --

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
1.7 19.72 92.8 0.047 -- -- 6.9 9334 9334 0.0 0.0 30.6
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)
1.78 1.83 82.6 0.173 -- 10.0 3.0 --

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
-- 1.78 19.72 0.0 0.0 8552 8552 885 97.3 0.2 0.2 0.2 0.266 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 1.78 1.89 -- 136 1173 0.336 0.371 0.32 88.2
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model restrained
Mean Isotropic B 33.2
Anisotropic B[1][1] -0.96
Anisotropic B[1][2] 0.73
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] -0.96
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] 1.92
RMS Deviations
Key Refinement Restraint Deviation
c_dihedral_angle_d 20.3
c_improper_angle_d 0.9
c_angle_deg 1.37
c_bond_d 0.01
c_mcangle_it 2.72
c_scangle_it 3.41
c_mcbond_it 1.78
c_scbond_it 2.36
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.23
Luzzati Sigma A (Observed) 0.19
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.32
Luzzati Sigma A (R-Free Set) 0.23
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 755
Nucleic Acid Atoms 0
Heterogen Atoms 28
Solvent Atoms 88

Software

Software
Software Name Purpose
DENZO data reduction
SCALEPACK data scaling
CNS refinement version: 1.0
CNS phasing version: 1.0