1E38

PORCINE PANCREATIC ELASTASE COMPLEXED WITH (3S, 4S)N-PARA-NITROBENZENESULPHONYL -3-ETHYL-4-(CARBOXYLIC ACID)PYRROLIDIN-2-ONE SOAKED IN PH 9 BUFFER FOR 2 MINUTES


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 9
Details 25MM SODIUM SULPHATE, 25MM SODIUM ACETATE, PH 5.0; THEN SOAKED IN 25 MM SODIUM SULPHATE, 50MM SODIUM ACETATE, 20 MG/ML GAMMA-LACTAM, 10% (V/V) DMSO, PH 5.0 FOR 24 HOURS

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 51.07 α = 90
b = 57.91 β = 90
c = 75.59 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
IMAGE PLATE MARRESEARCH -- 1998-07-15
Diffraction Radiation
Monochromator Protocol
SI(111) SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON ESRF BEAMLINE BM14 -- ESRF BM14

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 18.3 98.5 0.037 -- -- 7.7 -- 24440 -- 0.0 18.2
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 1.73 95.4 0.249 -- 5.74 3.0 --

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 18.3 -- 0.0 -- 24440 1011 98.5 -- -- 0.183 0.22 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 18.75
Anisotropic B[1][1] 0.169
Anisotropic B[1][2] 0.368
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 0.0
Anisotropic B[2][3] -0.533
Anisotropic B[3][3] 0.0
RMS Deviations
Key Refinement Restraint Deviation
p_special_tor 0.0
p_transverse_tor 22.7
p_staggered_tor 13.4
p_planar_tor 3.6
p_xyhbond_nbd 0.129
p_multtor_nbd 0.247
p_bond_d 0.01
p_angle_d 0.026
p_planar_d 0.026
p_mcbond_it 1.252
p_mcangle_it 1.7698
p_scbond_it 1.705
p_scangle_it 2.616
p_chiral_restr 0.121
p_singtor_nbd 0.17
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1822
Nucleic Acid Atoms 0
Heterogen Atoms 29
Solvent Atoms 150

Software

Computing
Computing Package Purpose
MOSFLM Data Reduction (intensity integration)
CCP4 (SCALA) Data Reduction (data scaling)
X-PLOR Structure Solution
REFMAC Structure Refinement
Software
Software Name Purpose
REFMAC refinement
X-PLOR model building