2BE6

2.0 A crystal structure of the CaV1.2 IQ domain-Ca/CaM complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	284	0.05M Bis-Tris, pH 6.5, 10-15% PEG4000, 0.25mM protein, VAPOR DIFFUSION, HANGING DROP, temperature 284K

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.21

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84.731	α = 90
b = 37.241	β = 97.77
c = 86.86	γ = 90

Symmetry
Space Group	P 1 21 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 210		2004-12-11	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 210		2004-11-21	M	MAD
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	1.116	ALS	8.3.1
2	SYNCHROTRON	ALS BEAMLINE 8.3.1	0.97972	ALS	8.3.1

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
1,2	1.95	40.6	97.5	0.052		3.6	39554	38548

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)
1,2	1.95	2.02	98.9	98.9	0.464		3.1

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2	20	35999	35999	1810	97.38	0.205	0.205	0.202	0.255	RANDOM	31.709

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]
0.86		0.51	-1.76		1.04

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.214
r_dihedral_angle_4_deg	19.676
r_dihedral_angle_3_deg	17.989
r_dihedral_angle_1_deg	4.804
r_scangle_it	3.089
r_scbond_it	2.052
r_angle_refined_deg	1.35
r_mcangle_it	1.171
r_mcbond_it	0.806
r_nbtor_refined	0.304
r_xyhbond_nbd_refined	0.237
r_nbd_refined	0.229
r_symmetry_vdw_refined	0.219
r_metal_ion_refined	0.206
r_symmetry_hbond_refined	0.142
r_chiral_restr	0.095
r_bond_refined_d	0.019
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3773
Nucleic Acid Atoms
Solvent Atoms	254
Heterogen Atoms	15

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling
SHARP	phasing