3EKH

Calcium-saturated GCaMP2 T116V/K378W mutant monomer

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3EK8	PDB entry 3EK8

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	0.1 M Magnesium formate dihydrate, 15% w/v Polyethylene glycol 3,350, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.55	65.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 121.648	α = 90
b = 121.648	β = 90
c = 97.327	γ = 90

Symmetry
Space Group	P 41 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	MAR CCD 165 mm		2008-07-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 31-ID	0.9793	APS	31-ID

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	25.9	100	0.096		14.1		49827

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	2.11	100		0.601	4.7	13.5

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	PDB entry 3EK8	2	23.41	47172	2546	99.92	0.19601	0.1945	0.22378	RANDOM	26.794

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]
0.21			0.21		-0.42

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.779
r_dihedral_angle_4_deg	17.944
r_dihedral_angle_3_deg	13.964
r_dihedral_angle_1_deg	5.938
r_scangle_it	3.265
r_scbond_it	2.169
r_mcangle_it	1.557
r_angle_refined_deg	1.332
r_mcbond_it	1.036
r_angle_other_deg	0.864
r_symmetry_vdw_other	0.24
r_symmetry_vdw_refined	0.208
r_nbd_refined	0.203
r_nbd_other	0.189
r_mcbond_other	0.178
r_nbtor_refined	0.171
r_xyhbond_nbd_refined	0.17
r_symmetry_hbond_refined	0.142
r_metal_ion_refined	0.135
r_nbtor_other	0.102
r_chiral_restr	0.078
r_bond_refined_d	0.011
r_gen_planes_refined	0.007
r_bond_other_d	0.005
r_gen_planes_other	0.004
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3152
Nucleic Acid Atoms
Solvent Atoms	277
Heterogen Atoms	10

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
SCALA	data scaling