4MTG

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	0.1M Na-citrate,pH 4.75, 2M ammonium sulfate, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 177.25	α = 90
b = 177.74	β = 132.59
c = 131.02	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		2012-11-15	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	3.296	30	94.3	0.091		4.7	42440	42440	1	1

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	3.296	3.48	85.7		0.568	2.1

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	3.296	29.86	40299	40299	2133	94.18	0.24117	0.2395	0.24	0.2725	0.27	RANDOM	98.188

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]
1.04		-0.83	3.78		-1.51

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.01
r_long_range_B_refined	19.544
r_long_range_B_other	19.544
r_dihedral_angle_3_deg	18.405
r_dihedral_angle_4_deg	17.175
r_mcangle_it	13.998
r_mcangle_other	13.964
r_scangle_other	12.051
r_mcbond_other	9.042
r_mcbond_it	9.041
r_scbond_it	7.65
r_scbond_other	7.649
r_dihedral_angle_1_deg	5.043
r_angle_refined_deg	1.514
r_angle_other_deg	0.832
r_chiral_restr	0.07
r_bond_refined_d	0.012
r_gen_planes_refined	0.007
r_bond_other_d	0.005
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	7192
Nucleic Acid Atoms
Solvent Atoms	4
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