X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Sitting Drop
pH 8
Temperature 277.0
Details CRYSTALS OF CA(151-231) WERE GROWN AT 4C IN 4 MICROLITER SITTING DROPS CONTAINING A 1:1 MIXTURE OF PROTEIN SOLUTION (2.1 MM CA(151-231) IN 10MM TRIS (PH 8.0) AND 2 MM 2-MERCAPTOETHANOL) AND RESERVOIR SOLUTION (2.0 M AMMONIUM SULFATE), vapor diffusion - sitting drop, temperature 277K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 41.98 α = 90
b = 41.98 β = 90
c = 88.92 γ = 90
Symmetry
Space Group P 43 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH COLLIMATOR 1996-12
Diffraction Radiation
Monochromator Protocol
SI(111) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON SSRL BEAMLINE BL1-5 -- SSRL BL1-5

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 25 99.6 -- 0.036 -- -- -- 9307 -- -2.0 21.1
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)
1.7 1.73 98.6 -- 0.232 5.0 -- --

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
MULTI-WAVELENGTH ANOMALOUS DISPERSION 1.7 25.0 -- -2.0 -- 9254 969 99.5 -- 0.215 0.215 0.253 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 1.7 1.81 -- 153 1320 0.276 0.328 0.027 99.1
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 22.6
Anisotropic B[1][1] 1.85
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 1.85
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -3.69
RMS Deviations
Key Refinement Restraint Deviation
x_angle_deg 1.1
x_bond_d 0.005
x_mcbond_it 1.31
x_improper_angle_d 1.01
x_scangle_it 3.92
x_scbond_it 2.41
x_mcangle_it 2.12
x_dihedral_angle_d 20.4
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.21
Luzzati Sigma A (Observed) 0.19
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.23
Luzzati Sigma A (R-Free Set) 0.19
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 556
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 88

Software

Software
Software Name Purpose
DENZO data reduction
SCALEPACK data scaling
X-PLOR model building version: 3.843
X-PLOR refinement version: 3.843
X-PLOR phasing version: 3.843