4REU

Revelation of Endogenously bound Fe2+ ions in the Crystal Structure of Ferritin from Escherichia coli

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	293	10mM Mg hexahydrtae, 2.0M Lithium sulfate, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.02	59.28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 127.998	α = 90
b = 127.998	β = 90
c = 170.902	γ = 90

Symmetry
Space Group	I 4

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 315	Si III	2012-12-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL26B2	1.00	SPring-8	BL26B2

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	2.5	50	100	0.092	13.9	3.9		45052	2	2

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	2.5	2.54	100		0.566	1.6	3.7	4667

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1EUM	2.5	50	45052	2402	99.96	0.17506	0.17506	0.17188	0.23539	RANDOM	47.757

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]
0.53			0.53		-1.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	41.219
r_dihedral_angle_4_deg	21.564
r_dihedral_angle_3_deg	18.503
r_long_range_B_refined	9.792
r_long_range_B_other	9.789
r_scangle_other	6.581
r_mcangle_other	5.761
r_mcangle_it	5.76
r_dihedral_angle_1_deg	5.638
r_scbond_it	4.248
r_scbond_other	4.248
r_mcbond_it	3.68
r_mcbond_other	3.675
r_angle_refined_deg	1.523
r_angle_other_deg	0.836
r_chiral_restr	0.081
r_bond_refined_d	0.013
r_gen_planes_refined	0.006
r_bond_other_d	0.005
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8148
Nucleic Acid Atoms
Solvent Atoms	197
Heterogen Atoms	149

Software

Software
Software Name	Purpose
HKL-2000	data collection
CCP4	model building
REFMAC	refinement
HKL-2000	data reduction
SCALA	data scaling
CCP4	phasing