3D10

Crystal Structure of S100B in the Calcium and Zinc Loaded State at pH 10.0

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	10	291	0.02 M CAPS pH 10.0, 23% PEG5000MME, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 34.75	α = 90
b = 58.18	β = 111.08
c = 47.85	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	MARMOSAIC 225 mm CCD		2005-02-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA	1.0089	SLS	X06SA

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	1.55	10	98.6	0.134	5.34	3		25152		-3	31.619

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	1.55	1.6	95.8		0.44	2

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 2H61 chain A and B	1.65	10	20791	1058	96.88	0.212	0.209	0.275	RANDOM	18.549

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]
1.39		-0.4	0.39		-2.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.069
r_dihedral_angle_3_deg	16.433
r_dihedral_angle_4_deg	14.505
r_dihedral_angle_1_deg	5.371
r_scangle_it	4.012
r_scbond_it	2.873
r_angle_refined_deg	1.907
r_mcangle_it	1.708
r_mcbond_it	1.325
r_nbtor_refined	0.314
r_symmetry_hbond_refined	0.291
r_symmetry_vdw_refined	0.271
r_nbd_refined	0.246
r_xyhbond_nbd_refined	0.195
r_metal_ion_refined	0.177
r_chiral_restr	0.151
r_bond_refined_d	0.021
r_gen_planes_refined	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1488
Nucleic Acid Atoms
Solvent Atoms	152
Heterogen Atoms	16

Software

Software
Software Name	Purpose
XSCALE	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction