X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 7.4
Temperature 297.0
Details MICROCRYSTALS WERE INITIALLY GROWN USING THE HANGING DROP METHOD IN LINBRO CULTURE PLATES. REFERENCES 7 (BODE, TURK & STURZEBACHER) AND 8 (BARTUNIK, SUMMERS & BARTSH) HAVE DESCRIBED THE CRYSTALLIZATION OF THE ORTHORHOMBIC FORM OF BOVINE TRYPSIN. CRYSTALS WERE SEEDING INTO DROPS CONTAINING 40 MG/ML BOVINE TRYPSIN, 0.0125 M BENZAMIDINE, 0.7 TO 0.9 M AS, 0.05 M MES PH 6.0, 0.0025 M CACL2 AFTER EQUILIBRATION AGAINST THE CRYSTALLIZATION RESERVOIR FOR 1 DAY. THE CRYSTALLIZATION RESERVOIRS CONTAINED 1.4 TO 1.8 M AS, 0.1 M MES PH 6.0, 0.005 M CACL2., pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 297K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 63.16 α = 90
b = 63.78 β = 90
c = 69.35 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 297
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH MIRRORS 1995-04-12
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE SIEMENS -- -- --

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 10 99.0 -- 0.078 -- 3.4 -- 26263 0.0 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)
1.8 1.9 99.9 -- 0.222 3.11 3.11 --

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
DIRECT REPLACEMENT 1.8 10.0 -- 2.0 22476 21586 890 99.0 -- -- 0.183 0.237 --
RMS Deviations
Key Refinement Restraint Deviation
p_transverse_tor 21.3
p_staggered_tor 16.2
p_planar_tor 3.0
p_xyhbond_nbd 0.228
p_multtor_nbd 0.214
p_bond_d 0.016
p_angle_d 0.03
p_planar_d 0.044
p_mcbond_it 1.628
p_mcangle_it 2.429
p_scbond_it 3.135
p_scangle_it 4.552
p_plane_restr 0.015
p_chiral_restr 0.165
p_singtor_nbd 0.167
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1629
Nucleic Acid Atoms 0
Heterogen Atoms 42
Solvent Atoms 218

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
PROFFT Structure Solution
PROFFT Structure Refinement
Software
Software Name Purpose
PROFFT refinement
PROFFT model building
SCALEPACK data reduction
DENZO data collection