Experiment: 2WLO

POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5		PRECIPITANT: 15 % PEG400 2.5 % PEG 4000 2.5 % PEG 8000 10 % GLYCEROL 90 MM HEPES PH 7.5 PROTEIN KIRBAC 3.1, 8MG/ML 150MM KCL 20MM TRIS PH 8.0 20MM TETRABUTYL AMMONIUM BROMIDE 4MM CYMAL-5 0.05% TDM PROTEIN AND PRECIPITANT WERE MIXED TOGETHER IN A 1:1 RATIO, AND EQUILIBRATED AGAINST RESERVOIR SOLUTION IN A SITTING-DROP VAPOUR-DIFFUSION SET-UP.

Crystal Properties
Matthews coefficient	Solvent content
7.36	83

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 105.86	α = 90
b = 115.36	β = 90
c = 289.11	γ = 90

Symmetry
Space Group	I 2 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	ADSC CCD	MIRRORS	2008-11-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	AUSTRALIAN SYNCHROTRON BEAMLINE MX1		Australian Synchrotron	MX1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	4	50	98.4	0.224	9.5	7.2				-3	136.35

Refinement

Statistics
Diffraction ID	Structure Solution 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	OTHER	NONE	4.036	14.995	1.47	13507	663	92.2	0.2453	0.2447	0.2608	0.2547	0.2616

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]
-53.7271			-57.0285		-51.0876

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	16.139
f_angle_d	1.02
f_chiral_restr	0.056
f_bond_d	0.016
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4336
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	3

Software

Software
Software Name	Purpose
PHENIX	refinement
DENZO	data reduction
SCALEPACK	data scaling