6Q6C

Pore-modulating toxins exploit inherent slow inactivation to block K+ channels

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		298	0.05M Potassium phosphate monobasic and 20% w/v PEG 8,000

Crystal Properties
Matthews coefficient	Solvent content
2.91	57.69

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.835	α = 90
b = 64.835	β = 90
c = 66.825	γ = 120

Symmetry
Space Group	P 32 2 1

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 QUANTUM 4		2011-11-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.98	ESRF	ID14-4

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rpim I (All)	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	1.3	28.07	99.41	0.06148	19.75	3.7		40174

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rpim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.3	1.346	98.84		0.714		3.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1Y62	1.3	28.07	38155	2022	99.42	0.16361	0.16158	0.20248	RANDOM	23.632

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]
0.93	0.47		0.93		-3.03

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	26.091
r_dihedral_angle_4_deg	18.489
r_dihedral_angle_3_deg	12.32
r_dihedral_angle_1_deg	8.177
r_scbond_it	8.137
r_scbond_other	5.19
r_rigid_bond_restr	5.188
r_scangle_other	5.141
r_long_range_B_refined	4.973
r_long_range_B_other	4.852
r_mcangle_other	3.582
r_mcangle_it	3.471
r_mcbond_it	3.307
r_mcbond_other	2.49
r_angle_refined_deg	2.217
r_angle_other_deg	1.676
r_chiral_restr	0.123
r_bond_refined_d	0.041
r_gen_planes_refined	0.017
r_gen_planes_other	0.002
r_bond_other_d	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	933
Nucleic Acid Atoms
Solvent Atoms	141
Heterogen Atoms	38

Software

Software
Software Name	Purpose
REFMAC	refinement
Epinorm	data reduction
HKL-2000	data scaling
MOLREP	phasing