X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.5
Details CRYSTALS WERE GROWN AT 18C USING THE HANGING DROP METHOD WITH 8-13% MONOMETHYL ETHER POLYETHYLENE GLYCOL 2000 OR 5000 AS PRECIPITANT. DROPS WERE BUFFERED WITH 0.1M TRIS/HCL PH 7.5 CONTAINING 5MM CACL2 AND THE PROTEIN CONCENTRATION WAS 30-35MG/ML. CRYSTALS WERE THEN SOAKED IN 10MM MALTOTRIOSE SOLUTION TO OBTAIN THE COMPLEX.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 52.72 α = 90
b = 78.27 β = 90
c = 238.86 γ = 90
Symmetry
Space Group C 2 2 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 293
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RAXIS IIC -- 1994-10-15
Diffraction Radiation
Monochromator Protocol
GRAPHITE SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RU200 -- -- --

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
2.2 30 94.0 0.05 -- -- 5.2 -- 23662 -- -- --
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)
2.2 2.3 77.0 0.09 -- 13.0 4.6 --

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 2.2 20.0 -- 0.0 -- 23662 1141 94.0 -- -- 0.13 0.21 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 12.1
RMS Deviations
Key Refinement Restraint Deviation
p_transverse_tor 28.8
p_staggered_tor 14.8
p_planar_tor 3.4
p_xyhbond_nbd 0.141
p_multtor_nbd 0.197
p_bond_d 0.01
p_angle_d 0.03
p_planar_d 0.031
p_mcbond_it 1.322
p_mcangle_it 1.936
p_scbond_it 1.772
p_scangle_it 2.732
p_plane_restr 0.01
p_chiral_restr 0.109
p_singtor_nbd 0.173
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3900
Nucleic Acid Atoms 0
Heterogen Atoms 47
Solvent Atoms 539

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
CCP4 (AGROVATA, ROTAVATA) Data Reduction (data scaling)
CCP4 Structure Solution
REFMAC Structure Refinement
Software
Software Name Purpose
REFMAC refinement
CCP4 model building