4MW8

Structural Basis for Ca2+ Selectivity of a Voltage-gated Calcium Channel

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.75	298	CHAPSO:DMPC bicelles, 0.1M Na-Acetate,pH 4.75, 2M Ammonium Sulfate, 28% Glucose, 15mM Calcium Chloride, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 229.218	α = 90
b = 124.883	β = 122.95
c = 124.763	γ = 90

Symmetry
Space Group	C 1 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 315r		2012-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.75	ALS	8.2.1

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	3.256	48.13	85	0.09		2.5	40167	40167	1	1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	3.256	48.13	37761	37761	2030	85.79	0.27805	0.27624	0.27	0.31368	0.31	RANDOM	92.23

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]
-4.02		-1.82	2.71		1.35

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.758
r_dihedral_angle_3_deg	18.739
r_dihedral_angle_4_deg	17.205
r_long_range_B_refined	16.601
r_long_range_B_other	16.601
r_mcangle_other	10.765
r_scangle_other	10.582
r_scbond_other	6.633
r_scbond_it	6.568
r_mcangle_it	5.939
r_dihedral_angle_1_deg	4.943
r_mcbond_it	3.991
r_mcbond_other	3.983
r_angle_refined_deg	1.658
r_angle_other_deg	0.883
r_chiral_restr	0.075
r_bond_refined_d	0.013
r_gen_planes_refined	0.008
r_bond_other_d	0.002
r_gen_planes_other	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_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7188
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	190

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHENIX	model building
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHENIX	phasing