X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 9.5
Details THE PROTEIN SOLUTIONS CONTAINED 10MM CA2+, 0.1M NACL, 5% PEG 4K IN 0.01M CHESS BUFFER (PH 9.5) AND AN ENZYME CONCENTRATION OF 11MG/ML; THE SOLUTION IN RESERVOIR CONTAINED 10% PEG 4K IN SAME BUFFER, ROOM TEMPERATURE OF 17 DEGREES C.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 97.13 α = 90
b = 103.69 β = 90
c = 23.27 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 280
Diffraction Detector
Detector Diffraction Type Details Collection Date
AREA DETECTOR SIEMENS-NICOLET X200B -- 1995-05
Diffraction Radiation
Monochromator Protocol
NICKEL --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RUH2R -- -- --

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
2.13 40 86.1 0.0459 -- -- 2.5 -- 12001 -- 0.0 26.24
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)
2.13 2.23 46.28 0.176 -- 4.9 1.6 --

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
STRUCTURE REFINEMENT 2.13 6.0 -- 3.0 -- 10174 1063 77.8 -- 0.152 0.152 0.255 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 2.13 2.22 -- 50 459 0.242 0.335 -- 46.28
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 25.41
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.29
x_bond_d 0.013
x_angle_deg 2.72
x_dihedral_angle_d 23.4
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.25
Luzzati Resolution Cutoff (Low) 6.0
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1916
Nucleic Acid Atoms 0
Heterogen Atoms 2
Solvent Atoms 190

Software

Computing
Computing Package Purpose
XENGEN Data Reduction (intensity integration)
XENGEN Data Reduction (data scaling)
X-PLOR Structure Solution
X-PLOR Structure Refinement
Software
Software Name Purpose
X-PLOR refinement
X-PLOR model building
XENGEN data reduction
XENGEN data collection