X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 4.8
Details pH 4.8

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 99.44 α = 90
b = 99.44 β = 90
c = 102.67 γ = 90
Symmetry
Space Group P 41 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD PRINCETON 2K DOUBLY-BOUNCED DOWNWARD, OFFSET=1INCH 1996-12
Diffraction Radiation
Monochromator Protocol
SI(111) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON CHESS BEAMLINE F2 -- CHESS F2

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
2.8 20 86.4 0.047 0.047 -- 3.11 -- 12366 -- 2.0 67.5
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)
2.8 2.9 67.2 0.178 0.181 592.5 1.93 --

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 PHASING 2.8 8.0 -- 2.0 -- 11106 8 86.4 -- 0.228 0.228 0.344 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 2.8 2.92 -- 8 749 0.345 0.435 -- 67.2
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 31.22
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.79
x_bond_d 0.009
x_angle_deg 1.857
x_dihedral_angle_d 24.7
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2940
Nucleic Acid Atoms 0
Heterogen Atoms 58
Solvent Atoms 65

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
PHASES V. 95, X-PLOR 3.1, XTALVIEW Structure Solution
X-PLOR 3.1 Structure Refinement
Software
Software Name Purpose
X-PLOR version: 3.1 refinement
XTALVIEW model building
X-PLOR version: 3.1 model building
PHASES-95 model building
SCALEPACK data reduction
DENZO data collection