X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Sitting Drop
pH 6.5
Temperature 293.0
Details SITTING DROPS WERE PREPARED BY MIXING EQUAL VOLUMES OF PROTEIN WHICH WAS 14 MG/ ML IN 20MM HEPES, PH 7.5 AND TO WHICH AN EXCESS OF SOLID INHIBITOR HAD BEEN ADDED AND RESERVOIR SOLUTION (30% PEG 2000 MONOMETHYLETHER, 0.1M SODIUM ACETATE, PH 5.0 AND 0.2M AMMONIUM SULFATE). THIS MIXTURE WAS INCUBATED OVERNIGHT AT 4C AND CENTRIFUGED TO REMOVE PRECIPITATE BEFORE SETTING UP CRYSTALLIZATION DROPS. CO-CRYSTALS WERE GROWN FROM 6 ML SITTING DROPS OF THE PROTEIN-RESERVOIR SOLUTION AND 0.3 ML OF THE RESERVOIR SOLUTION AT EITHER ROOM TEMPERATURE OR 4C, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 49.3 α = 90
b = 51.2 β = 90
c = 203.3 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 298
2 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH -- 1998-11-11
IMAGE PLATE MARRESEARCH -- 1997-04-21
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RU300 -- -- --
SYNCHROTRON NSLS BEAMLINE X25 -- NSLS X25

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 20 -- 0.103 -- -- 16.0 35656 545270 0.0 2.0 25.0
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 97.6 0.314 -- -- 7.0 --

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
-- 2.0 20.0 0.0 0.0 35831 33702 3355 94.1 -- 0.198 0.198 0.259 RANDOM
RMS Deviations
Key Refinement Restraint Deviation
c_angle_deg 2.0
c_bond_d 0.018
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3392
Nucleic Acid Atoms 0
Heterogen Atoms 72
Solvent Atoms 340

Software

Software
Software Name Purpose
AMoRE phasing
CNS refinement
MAR345 data collection
DENZO data reduction
SCALEPACK data scaling