1HAY

SNAPSHOTS OF SERINE PROTEASE CATALYSIS: (B) ACYL-ENZYME INTERMEDIATE BETWEEN PORCINE PANCREATIC ELASTASE AND HUMAN BETA-CASOMORPHIN-7 JUMPED TO PH 10 FOR 10 SECONDS


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 10
Details CRYSTALLISED FROM 25MM SODIUM SULPHATE, 25MM SODIUM ACETATE (PH 5.0), 25 MG/ML PPE AND 25 MG/ML BCM7.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 49.74 α = 90
b = 57.87 β = 90
c = 73.47 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD MARRESEARCH -- 1998-06-15
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON ESRF BEAMLINE ID14-3 -- ESRF ID14-3

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
1.7 37.7 97.7 0.06 -- -- 3.6 -- 23364 -- 0.0 16.1
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)
1.7 1.79 91.0 0.275 -- 3.7 3.4 --

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 1.7 38.0 -- 0.0 -- 23364 966 97.7 -- 0.195 0.195 0.214 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 1.7 1.73 -- 42 1062 0.285 0.34 -- --
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 17.9
Anisotropic B[1][1] -6.087
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 2.056
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] 4.031
RMS Deviations
Key Refinement Restraint Deviation
c_scangle_it 2.59
c_scbond_it 1.732
c_mcangle_it 1.716
c_mcbond_it 1.126
c_bond_d 0.0047
c_angle_deg 1.29
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1809
Nucleic Acid Atoms 0
Heterogen Atoms 6
Solvent Atoms 137

Software

Computing
Computing Package Purpose
MOSFLM Data Reduction (intensity integration)
CCP4 (SCALA) Data Reduction (data scaling)
CNS 1.0 Structure Refinement
Software
Software Name Purpose
CNS version: 1.0 refinement