X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 8
Details 12 - 16% PEG 8K, 10 MM TRIS-HCL, PH 8.0, pH 8.00

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 74.6 α = 90
b = 55.8 β = 109.6
c = 90.1 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 93
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD BRANDEIS -- 1997-09
Diffraction Radiation
Monochromator Protocol
-- MAD
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON NSLS BEAMLINE X12C 0.9791,0.9788,0.954 NSLS X12C

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
2.25 20 98.9 -- 0.05 -- 5.1 -- 169725 -- 2.0 15.95
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)
2.25 2.33 98.1 -- 0.094 15.0 2.8 --

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 2.25 20.0 -- 2.0 -- 31619 1571 98.9 -- -- 0.177 0.229 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 2.25 2.35 -- 192 3476 0.2255 0.2602 0.02 --
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 20.45
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.19
x_angle_deg 1.44
x_bond_d 0.009
x_dihedral_angle_d 25.6
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.22
Luzzati Sigma A (Observed) 0.18
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.3
Luzzati Sigma A (R-Free Set) 0.23
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 4919
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 414

Software

Software
Software Name Purpose
SnB phasing
SOLVE phasing
MLPHARE phasing
DM model building
X-PLOR refinement version: 3.8
DENZO data reduction
SCALEPACK data scaling
DM phasing