Experiment: 6U9Z

Wild-type MthK pore in 6 mM K+

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3LDC	PDB entry 3LDC

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	293	protein (in 100 mM sodium chloride, 1 mM potassium chloride, 10 mM MOPS) + 3.5-4.0 M 1,6-hexanediol, 100 mM MES-NaOH, pH 6.75, 5 mM potassium chloride

Crystal Properties
Matthews coefficient	Solvent content
2.5	50.74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.811	α = 90
b = 63.811	β = 90
c = 44.05	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	PIXEL	DECTRIS PILATUS 6M		2012-06-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.009	NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	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	1.954	44.05	99.66	0.1864	0.1903	0.03809	0.999	15.95	24.7		6986			27.31

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.954	2.024	97.05		2.1	2.148	0.4475	0.751	1.57	22.5

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	MOLECULAR REPLACEMENT	FREE R-VALUE	PDB entry 3LDC	1.954	44.05	1.34	6982	691	99.66	0.2067	0.2046	0.2056	0.2263	0.2256	34.49

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	2.0876
f_angle_d	0.4328
f_chiral_restr	0.0351
f_plane_restr	0.0026
f_bond_d	0.0024

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	637
Nucleic Acid Atoms
Solvent Atoms	30
Heterogen Atoms	13

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
PHENIX	phasing
XDS	data scaling