Experiment: 4WFC

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		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.	2.35	71.479	0.09	43544	4074	99.77	0.1857	0.1837	0.19	0.224	0.23	65.5484

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.903
f_angle_d	1.038
f_chiral_restr	0.044
f_bond_d	0.008
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4310
Nucleic Acid Atoms
Solvent Atoms	463
Heterogen Atoms	20

Software

Software
Software Name	Purpose
XDS	data reduction
PHENIX	refinement
Aimless	data scaling
XSCALE	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.