X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion
pH 5.5
Temperature 277.0
Details CRYSTALLIZATION WAS PERFORMED BY VAPOR DIFFUSION. PROTEASE (2 MG/ML) AND INHIBITOR (40 MM IN DMSO) WAS MIXED IN A RATIO OF 1:1 AND SUBJECTED TO COCRYSTALLIZATION. DROPS CONSISTING OF 5 MICROLITERS OF THE PROTEASE-INHIBITOR MIXTURE PLUS 5 MICROLITERS OF THE CRYSTALLIZATION BUFFER (50 MM MES PH 5.5, 0.4 M NACL AND 0.02% (W/V) NAN3) WERE EQUILIBRATED AGAINST THE SAME BUFFER AT 4 DEGREES C., vapor diffusion, temperature 277K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 58 α = 90
b = 85.8 β = 90
c = 46.5 γ = 90
Symmetry
Space Group P 21 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 278
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH -- 1995-05
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON LURE BEAMLINE DW32 -- LURE DW32

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 91.7 0.041 -- -- -- -- 14846 -- 2.0 --
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)
2.0 2.07 80.0 0.088 -- -- -- --

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 2.0 8.0 -- 2.0 -- 14846 -- 91.7 -- 0.187 0.187 0.247 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 2.0 2.07 -- -- 1397 0.088 -- -- 88.2
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 17.0
RMS Deviations
Key Refinement Restraint Deviation
x_dihedral_angle_d 25.5
x_bond_d 0.01
x_improper_angle_d 1.32
x_angle_deg 1.9
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1516
Nucleic Acid Atoms 0
Heterogen Atoms 41
Solvent Atoms 75

Software

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