3GK4

X-ray structure of bovine SBi523,Ca(2+)-S100B

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6	295	35% PEGMME550, 7.5mM CaCl2, 100mM Bis-Tris buffer, 2.5% Glycerol, pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.14	42.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 34.459	α = 90
b = 89.532	β = 90
c = 59.234	γ = 90

Symmetry
Space Group	C 2 2 21

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		2008-04-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.98	SSRL	BL9-1

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	1.9	50	93.6	0.037	44.176	6.3		7056

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	1.9	1.97	64.8		0.273		3.6	473

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 1MHO	1.9	44.77	7045	326	93.57	0.21	0.209	0.228	RANDOM	47.206

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]
1.44			-1.83		0.39

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.999
r_dihedral_angle_4_deg	17.574
r_dihedral_angle_3_deg	15.601
r_dihedral_angle_1_deg	5.069
r_scangle_it	3.173
r_scbond_it	1.979
r_angle_refined_deg	1.62
r_mcangle_it	1.144
r_mcbond_it	0.763
r_nbtor_refined	0.304
r_symmetry_vdw_refined	0.239
r_nbd_refined	0.233
r_xyhbond_nbd_refined	0.229
r_symmetry_hbond_refined	0.199
r_metal_ion_refined	0.138
r_chiral_restr	0.133
r_bond_refined_d	0.015
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	727
Nucleic Acid Atoms
Solvent Atoms	40
Heterogen Atoms	30

Software

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