X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.3
Details SELENOMETHIONINE LABELLED CRYSTALS WERE GROWN BY THE SITTING DROP METHOD OF VAPOUR DIFFUSION FROM 50% AMMONIUM SULPHATE SOLUTIONS BUFFERED WITH 50MM NAKPO4, PH = 7.3, AND IN THE PRESENCE OF 50 MM TRIC/HCL, PH =7.3. MICROSEEDING WITH WILD-TYPE CRYSTALS PRODUCED CRYSTALS THAT GREW TO 0.1 X 0.2 X 0.7 MM**3 OVER 5-7 DAYS. CRYSTALS WERE THEN SOAKED FOR 4 HOURS IN 5 MM SODIUM OXALATE BEFORE BEING FLASH FROZEN.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 76.33 α = 70.1
b = 80.93 β = 71.95
c = 82.13 γ = 66.42
Symmetry
Space Group P 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD ARGONNE APS-1 MIRROR 1998-11-15
Diffraction Radiation
Monochromator Protocol
SI(111) SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON APS BEAMLINE 19-ID -- APS 19-ID

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
1.65 20 95.4 -- 0.047 -- 2.3 -- 190231 -- -- 13.4
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)
1.65 1.68 79.4 -- 0.171 3.9 1.9 --

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 1.65 20.0 -- 0.0 -- 190161 9561 95.4 -- 0.138 0.146 0.181 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 15.8
RMS Deviations
Key Refinement Restraint Deviation
p_transverse_tor 20.2
p_staggered_tor 12.7
p_planar_tor 6.6
p_multtor_nbd 0.258
p_bond_d 0.018
p_angle_d 0.032
p_planar_d 0.035
p_mcbond_it 1.38
p_mcangle_it 1.79
p_scbond_it 2.41
p_scangle_it 3.22
p_plane_restr 0.015
p_chiral_restr 0.155
p_singtor_nbd 0.186
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 11970
Nucleic Acid Atoms 0
Heterogen Atoms 145
Solvent Atoms 2464

Software

Computing
Computing Package Purpose
HKL-2000 Data Reduction (intensity integration)
HKL-2000 Data Reduction (data scaling)
CCP4 Structure Solution
REFMAC Structure Refinement
Software
Software Name Purpose
REFMAC refinement
CCP4 model building