X-RAY DIFFRACTION Experimental Data & Validation

X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion
pH 8.2
Details trypsin-benzamidine, P3(1) 2 1 were grown by vapor diffusion, as described for P2(1) 2(1) 2(1) (large cell) (Mangel, et al., Biochemistry 29, 8351-8357, 1990) The crystal was soaked in a solution of 85 % saturated MgSO4 . 7 H2O, 100 mM Tris, 1 mM CaCl2, 2.0 % DMSO,saturated with inhibitor, pH 8.20 over a period of several days with several replacements of the soaking solution., VAPOR DIFFUSION

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 55.03 α = 90
b = 55.03 β = 90
c = 109.21 γ = 120
Symmetry
Space Group P 31 2 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 298
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RIGAKU RAXIS IV++ MSC MIRRORS 1997-12-18
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE -- -- -- --

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
1.33 35.91 88.0 0.0502 -- -- 3.2 37545 n/a -- 1.0 --
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)
1.36 1.42 50.4 0.224 -- 2.5 -- --

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
DIFFERENCE FOURIER PLUS REFINEMENT 1.36 7.5 -- 1.8 -- 36792 3693 88.0 -- 0.197 0.197 0.224 --
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 1.36 1.42 -- 254 2320 0.417 0.448 -- 50.4
RMS Deviations
Key Refinement Restraint Deviation
x_bond_d 0.019
x_angle_deg 3.7
x_improper_angle_d 0.58
x_dihedral_angle_d 26.3
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3270
Nucleic Acid Atoms 0
Heterogen Atoms 52
Solvent Atoms 612

Software

Software
Software Name Purpose
BIOTEX data collection version: (MSC)
BIOTEX data reduction version: (MSC)
X-PLOR model building version: 3.1
Quanta model building
INSIGHTII model building
X-PLOR refinement version: 3.1
BIOTEX data scaling
X-PLOR phasing version: 3.1
INSIGHTII phasing