3O77

The structure of Ca2+ Sensor (Case-16)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.4	293	Reservoir: 50mM Imidazol, 1.9M Na2malonate pH 6.4; Protein stock solution: 50mM Tris HCl (pH 7.4), 150mM NaCl, 10mM dithiothreitol, protein 4.1mg/ml; Drop ratio reservoir/protein = 1/3, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.57

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 92.499	α = 90
b = 106.941	β = 90
c = 43.265	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	77	CCD	MARMOSAIC 225 mm CCD			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.9999	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	2.35	70.01	98.7	0.088	14.4	6.9		18555

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.35	2.54	90.1		0.577	3.3	6.9

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.35	70.01	17634	17624	928	99.94	0.2015	0.19766	0.274	RANDOM	51.408

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]
0.89			-0.42		-0.47

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.095
r_dihedral_angle_3_deg	20.785
r_dihedral_angle_4_deg	14.082
r_dihedral_angle_1_deg	7.651
r_scangle_it	4.43
r_scbond_it	2.693
r_mcangle_it	1.892
r_angle_refined_deg	1.891
r_mcbond_it	0.999
r_nbtor_refined	0.305
r_symmetry_vdw_refined	0.269
r_symmetry_hbond_refined	0.264
r_nbd_refined	0.252
r_xyhbond_nbd_refined	0.184
r_metal_ion_refined	0.182
r_chiral_restr	0.111
r_bond_refined_d	0.019
r_gen_planes_refined	0.008
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3056
Nucleic Acid Atoms
Solvent Atoms	145
Heterogen Atoms	13

Software

Software
Software Name	Purpose
MAR345dtb	data collection
MOLREP	phasing
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling