1X0G

Crystal Structure of IscA with the [2Fe-2S] cluster

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2	277	2.5M NaCl, 0.1M Potassium phosphate pH6.2, 5MM DTT, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.7	54.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 77.472	α = 90
b = 102.788	β = 90
c = 137.032	γ = 90

Symmetry
Space Group	I 2 2 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	Bruker DIP-6040		2004-07-07	M	MAD
2	1	x-ray	100	IMAGE PLATE	DIP6040		2004-09-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL44XU	0.900	SPring-8	BL44XU
2	SYNCHROTRON	SPRING-8 BEAMLINE BL44XU	0.900	SPring-8	BL44XU

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	2.5	80	96	0.071	39.4	12.5		19261			59.41

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)
	2.5	2.59	96.6		0.311	3.5	6.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2.5	30	18065	932	98.39	0.20302	0.20107	0.2415	RANDOM	69.352

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]
2.69			-1.48		-1.2

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.483
r_dihedral_angle_4_deg	23.6
r_dihedral_angle_3_deg	22.192
r_dihedral_angle_1_deg	8.983
r_scangle_it	5.633
r_scbond_it	3.42
r_angle_refined_deg	2.503
r_mcangle_it	2.171
r_mcbond_it	1.141
r_nbtor_refined	0.34
r_nbd_refined	0.276
r_symmetry_vdw_refined	0.26
r_symmetry_hbond_refined	0.25
r_xyhbond_nbd_other	0.183
r_xyhbond_nbd_refined	0.166
r_chiral_restr	0.14
r_bond_refined_d	0.028
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3302
Nucleic Acid Atoms
Solvent Atoms	36
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing