X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 6.8
Temperature 298.0
Details Drops contained 2 microlitres of protein solution (10mg/ml in 20mM KCL, 40mM HEPES pH 7.5) supplemented with 2mM DTT and 0.3 mM ZnCl2 and 2 microlitres of precipitant (1.5 M ammonium sulfate, 10% dioxane, 0.1 M MES pH 6.8) and were equilibrated against 1ml of the same precipitant., VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 77.18 α = 90
b = 77.18 β = 90
c = 199.21 γ = 120
Symmetry
Space Group P 65 2 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD ADSC QUANTUM 4 Bent conical Si-mirror (Rh coating) 2000-03-31
Diffraction Radiation
Monochromator Protocol
Bent cylindrical Ge(111) monochromator MAD
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON APS BEAMLINE 14-BM-C 1.0 APS 14-BM-C

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 30 99.7 0.048 -- -- 23.9 18629 18629 0.0 0.0 32.2
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 2.28 99.9 0.323 -- 14.0 6.9 1968

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
MAD 2.2 30.0 0.0 0.0 33455 33455 1671 99.3 -- -- 0.2295 0.2567 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 39.9
RMS Deviations
Key Refinement Restraint Deviation
c_angle_deg 1.9
c_mcangle_it 4.3
c_mcbond_it 2.8
c_scbond_it 4.1
c_scangle_it 5.8
c_bond_d 0.015
c_dihedral_angle_d 24.2
c_improper_angle_d 1.2
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.31
Luzzati Sigma A (Observed) 0.34
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.35
Luzzati Sigma A (R-Free Set) 0.32
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1789
Nucleic Acid Atoms 0
Heterogen Atoms 33
Solvent Atoms 144

Software

Software
Software Name Purpose
SOLVE phasing
CNS refinement version: 0.9
DENZO data reduction
SCALEPACK data scaling