4G1A

Metal-binding properties of a self-assembled coiled coil: formation of a polynuclear Cd-thiolated cluster

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	100mM HEPES pH 7.5 and 1.5-2.0M ammonium sulfate, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.68	26.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 30.762	α = 90
b = 35.204	β = 97.49
c = 64.123	γ = 90

Symmetry
Space Group	C 1 2 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	BRUKER SMART 6000	Montel200 mirrors		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	BRUKER AXS MICROSTAR	1.54

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.85	23.05	96.2	0.025	0.087	42.9	55.8	5926	5702	2	2	18.85

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.85	1.91	71		0.25	0.25	4.21	3.6	449

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	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	SAD	THROUGHOUT	1.85	23.05	3	4707	4707	223	83.23	0.19437	0.19133	0.25244	RANDOM	18.851

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]
1.45		0.2	-2.12		0.72

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	48.388
r_dihedral_angle_3_deg	21.312
r_scangle_it	7.848
r_dihedral_angle_1_deg	5.236
r_scbond_it	4.623
r_mcangle_it	2.381
r_rigid_bond_restr	2.203
r_angle_refined_deg	1.786
r_mcbond_it	1.349
r_chiral_restr	0.114
r_bond_refined_d	0.021
r_gen_planes_refined	0.005
r_bond_other_d
r_angle_other_deg
r_dihedral_angle_4_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	567
Nucleic Acid Atoms
Solvent Atoms	10
Heterogen Atoms	4

Software

Software
Software Name	Purpose
PROTEUM PLUS	data collection
SHELXS	phasing
REFMAC	refinement
SAINT	data reduction
SCALEPACK	data scaling