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The structure was solved with data from a Ta6Br14 soaked crystal at low resolution (5.2A) by SAD with SHELX and HKL2MAP using the anomalous Ta signal. Identifiable alpha-helices were manually placed and used as a starting model for SAD-MR by exploiting the anomalous Se signal from Se-Met derivatised crystal,using the program Phenix Autosol. The structure was finally modelled and refined using the natived data submitted.
Crystallization
Crystalization Experiments
ID
Method
pH
Temperature
Details
1
VAPOR DIFFUSION, SITTING DROP
5.8
293.15
1.8 M ammonium sulfate, 125 mM sodium chloride, 100 mM sodium cacodylate pH 5.8
Crystal Properties
Matthews coefficient
Solvent content
2.98
58.66
Crystal Data
Unit Cell
Length ( Å )
Angle ( ˚ )
a = 98.397
α = 90
b = 98.397
β = 90
c = 208.018
γ = 90
Symmetry
Space Group
P 41 2 2
Diffraction
Diffraction Experiment
ID #
Crystal ID
Scattering Type
Data Collection Temperature
Detector
Detector Type
Details
Collection Date
Monochromator
Protocol
1
1
x-ray
100
CCD
MARMOSAIC 225 mm CCD
2011-09-28
M
SINGLE WAVELENGTH
Radiation Source
ID #
Source
Type
Wavelength List
Synchrotron Site
Beamline
1
SYNCHROTRON
ESRF BEAMLINE ID23-2
0.873
ESRF
ID23-2
Data Collection
Overall
ID #
Resolution (High)
Resolution (Low)
Percent Possible (Observed)
Rpim I (All)
CC (Half)
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
2.35
88.95
99.8
0.043
0.999
16.6
12.9
43613
41.65
Highest Resolution Shell
ID #
Resolution (High)
Resolution (Low)
Percent Possible (All)
Percent Possible (Observed)
Rpim I (All)
CC (Half)
Mean I Over Sigma (Observed)
Redundancy
Number Unique Reflections (All)
1
2.35
2.43
97.8
0.562
0.586
1.6
12.7
4107
Refinement
Statistics
Diffraction ID
Structure Solution Method
Cross Validation method
Starting model
Resolution (High)
Resolution (Low)
Cut-off Sigma (F)
Number Reflections (Observed)
Number Reflections (R-Free)
Percent Reflections (Observed)
R-Factor (Observed)
R-Work (Depositor)
R-Work (DCC)
R-Free (Depositor)
R-Free (DCC)
Mean Isotropic B
X-RAY DIFFRACTION
SAD
FREE R-VALUE
The structure was solved with data from a Ta6Br14 soaked crystal at low resolution (5.2A) by SAD with SHELX and HKL2MAP using the anomalous Ta signal. Identifiable alpha-helices were manually placed and used as a starting model for SAD-MR by exploiting the anomalous Se signal from Se-Met derivatised crystal,using the program Phenix Autosol. The structure was finally modelled and refined using the natived data submitted.