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 OVER 5-7 DAYS.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 76.34 α = 70.3
b = 81.03 β = 72.2
c = 82.3 γ = 66.4
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 1998-07-15
Diffraction Radiation
Monochromator Protocol
SI(111) MAD
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON APS BEAMLINE 19-ID 0.9465, 0.9793, 0.9795, 1.033, 1.078, 1.00 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 94.2 -- 0.039 -- 2.8 -- 187107 -- -- 15.6
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 80.6 -- 0.198 3.9 1.7 --

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
MAD 1.65 20.0 -- 0.0 -- 177665 9436 94.2 -- -- 0.15 0.189 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 17.9
RMS Deviations
Key Refinement Restraint Deviation
p_transverse_tor 20.2
p_staggered_tor 13.0
p_planar_tor 6.4
p_multtor_nbd 0.25
p_bond_d 0.018
p_angle_d 0.033
p_planar_d 0.038
p_mcbond_it 1.62
p_mcangle_it 2.14
p_scbond_it 2.74
p_scangle_it 3.99
p_plane_restr 0.015
p_chiral_restr 0.17
p_singtor_nbd 0.188
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 11970
Nucleic Acid Atoms 0
Heterogen Atoms 125
Solvent Atoms 1865

Software

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