1S98

E.coli IscA crystal structure to 2.3 A

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	296	NaPhosphate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 23K

Crystal Properties
Matthews coefficient	Solvent content
4.74	73.83

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.252	α = 90
b = 66.252	β = 90
c = 150.85	γ = 120

Symmetry
Space Group	P 32 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	93	CCD	ADSC QUANTUM 4		2002-12-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2

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	2.3	20	99.9	0.069	7.2	8.2		20165			47.3

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)
	2.3	2.35	99.6		0.436	2	6.2	1148

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	2.3	19.92	15810	1785	99.54	0.215	0.215	0.212	0.24967	RANDOM	53.454

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]
0.18	0.09		0.18		-0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	9.028
r_scangle_it	8.774
r_scbond_it	6.439
r_mcangle_it	4.468
r_mcbond_it	2.949
r_angle_refined_deg	2.507
r_symmetry_hbond_refined	1.396
r_angle_other_deg	1.228
r_symmetry_vdw_other	0.346
r_nbd_other	0.292
r_symmetry_vdw_refined	0.278
r_nbd_refined	0.267
r_xyhbond_nbd_refined	0.207
r_chiral_restr	0.185
r_nbtor_other	0.106
r_bond_refined_d	0.038
r_gen_planes_refined	0.009
r_bond_other_d	0.005
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1441
Nucleic Acid Atoms
Solvent Atoms	38
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
CNS	phasing