X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.5
Temperature 293.0
Details GAMMA-CHYMOTRYPSIN CRYSTALS WERE SOAKED INTO A SOLUTION CONTAINING SATURATED INHIBITOR, 65% SATURATED AMMONIUM SULFATE AND 100 MM HEPES BUFFER (PH7.5) AT 293K FOR A MONTH.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 69.84 α = 90
b = 69.84 β = 90
c = 97.36 γ = 90
Symmetry
Space Group P 42 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 292
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RIGAKU YALE MIRRORS 1995-11-10
Diffraction Radiation
Monochromator Protocol
NI FILTER --
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
1.8 97.4 98.1 0.059 -- -- 9.5 -- 22647 -- 1.0 19.0
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)
1.8 1.9 95.6 0.128 -- 4.09 -- --

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
MOLECULAR REPLACEMENT 1.8 5.0 -- 2.0 -- 21268 1683 97.6 -- 0.181 0.181 0.182 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 1.8 1.86 -- 159 1841 0.245 0.204 0.016 93.9
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 22.4
RMS Deviations
Key Refinement Restraint Deviation
x_dihedral_angle_d 26.6
x_bond_d 0.007
x_angle_deg 1.47
x_improper_angle_d 1.25
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.2
Luzzati Resolution Cutoff (Low) 5.0
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1745
Nucleic Acid Atoms 0
Heterogen Atoms 61
Solvent Atoms 127

Software

Computing
Computing Package Purpose
CONTROL Data Reduction (intensity integration)
PROCESS Data Reduction (data scaling)
X-PLOR 3.1 Structure Solution
X-PLOR 3.1 Structure Refinement
Software
Software Name Purpose
PROCESS data reduction
CONTROL data collection
X-PLOR version: 3.1 model building
X-PLOR version: 3.1 refinement