1MY6

The 1.6 A Structure of Fe-Superoxide Dismutase from the thermophilic cyanobacterium Thermosynechococcus elongatus : Correlation of EPR and Structural Characteristics

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.7	293.15	VAPOR DIFFUSION, HANGING DROP, 293.15K, 0.1M Sodium Cacodylate pH 6.7, 0.2M Magnesium Acetate Tetrahydrate, 20% PEG 6K

Crystal Properties
Matthews coefficient	Solvent content
2.61	52.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.749	α = 90
b = 63.644	β = 110.45
c = 74.709	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	ADSC QUANTUM 4		2002-06-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X8C	1.100	NSLS	X8C

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	1.6	70	94.5	0.088	6.35	16.18		53851		-3	15.3

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)
	1.6	1.642	93.4		0.32	0.32	6.35	14.28	5643

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	FeSOD from E.coli, PDB entry 1isc	1.6	70	53851	2896	94.46	0.19577	0.19377	0.23208	RANDOM	15.669

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]
1.64		0.82	-1.54		0.48

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.88
r_scangle_it	3.693
r_sphericity_free	3.671
r_scbond_it	2.616
r_sphericity_bonded	2.124
r_mcangle_it	1.91
r_angle_refined_deg	1.623
r_rigid_bond_restr	1.522
r_mcbond_it	1.312
r_angle_other_deg	0.903
r_symmetry_vdw_other	0.297
r_nbd_other	0.247
r_nbd_refined	0.231
r_xyhbond_nbd_refined	0.213
r_symmetry_hbond_refined	0.206
r_symmetry_vdw_refined	0.177
r_chiral_restr	0.107
r_nbtor_other	0.087
r_bond_refined_d	0.016
r_gen_planes_other	0.011
r_gen_planes_refined	0.01
r_bond_other_d	0.002
r_dihedral_angle_2_deg
r_xyhbond_nbd_other
r_symmetry_hbond_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3128
Nucleic Acid Atoms
Solvent Atoms	565
Heterogen Atoms	2

Software

Software
Software Name	Purpose
REFMAC	refinement
EPMR	phasing