2QVM

The second Ca2+-binding domain of the Na+-Ca2+ exchanger is essential for regulation: crystal structures and mutational analysis

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.3	293	21% (w/v) PEG-3350, 0.1 M HEPES (pH 6.3), CBD2 at 15 mg/ml, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.97	36.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.03	α = 90
b = 59.232	β = 90
c = 22.592	γ = 90

Symmetry
Space Group	P 21 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 QUANTUM 315		2007-04-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.0	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	1.703	48.8	99.8	0.069	25.4	12.8		12622

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)
	1.703	1.76	98.2		0.489	3	8.3

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	2QVK	1.703	48.8	12622	656	99.67	0.18635	0.18469	0.21926	RANDOM	16.66

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]
-0.37			0.86		-0.48

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.449
r_dihedral_angle_4_deg	13.454
r_dihedral_angle_3_deg	12.253
r_dihedral_angle_1_deg	6.528
r_scangle_it	5.345
r_scbond_it	3.178
r_mcangle_it	1.757
r_angle_refined_deg	1.448
r_mcbond_it	1.213
r_nbtor_refined	0.308

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.449
r_dihedral_angle_4_deg	13.454
r_dihedral_angle_3_deg	12.253
r_dihedral_angle_1_deg	6.528
r_scangle_it	5.345
r_scbond_it	3.178
r_mcangle_it	1.757
r_angle_refined_deg	1.448
r_mcbond_it	1.213
r_nbtor_refined	0.308
r_symmetry_vdw_refined	0.238
r_nbd_refined	0.21
r_symmetry_hbond_refined	0.111
r_chiral_restr	0.108
r_xyhbond_nbd_refined	0.106
r_metal_ion_refined	0.057
r_bond_refined_d	0.014
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	939
Nucleic Acid Atoms
Solvent Atoms	105
Heterogen Atoms	2

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.