Experiment: 2X6A

Potassium Channel from Magnetospirillum Magnetotacticum

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2WLH	PDB ENTRY 2WLH

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5		SITTING DROP VAPOUR DIFFUSION, 2:1 PROTEIN:CRYSTALLANT RATIO. CRYSTALLANT: 25% PEG400 2.5% PEG4K 2.5% PEG8K 10% GLYCEROL 90MM HEPES PH 7.5 ADDITIVES: FOS-CHOLINE-ISO-11-6U (ANATRACE) NONYL MALTOSIDE (ANATRACE) FOS-CHOLINE ISO-9 (ANATRACE)

Crystal Properties
Matthews coefficient	Solvent content
3.84	67.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 107.759	α = 90
b = 107.759	β = 90
c = 89.242	γ = 90

Symmetry
Space Group	P 4 21 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		2009-09-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	AUSTRALIAN SYNCHROTRON BEAMLINE MX2		Australian Synchrotron	MX2

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	3.1	50	100	0.14	20.1	13.8		10032		-3	73.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.1	3.21	100		0.96	2.9	14.3

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	MOLECULAR REPLACEMENT	PDB ENTRY 2WLH	3.1	44.621	0.17	9676	464	96.6	0.2226	0.2201	0.226	0.2713	0.2774

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]
5.6162			5.6162		-11.2324

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	22.631
f_angle_d	1.108
f_chiral_restr	0.071
f_bond_d	0.014
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2126
Nucleic Acid Atoms
Solvent Atoms	1
Heterogen Atoms	14

Software

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