3BVK

Structural basis for the iron uptake mechanism of Helicobacter pylori ferritin

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	295	100 mM HEPES, 10% isopropanol, 200 mM sodium citrate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.71	54.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 128.454	α = 90
b = 128.454	β = 90
c = 165.334	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 210		2006-10-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PAL/PLS BEAMLINE 4A	1.0	PAL/PLS	4A

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	1.5	50	98	0.088	31.3		212629	208376

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	1.5	1.55	86.1		0.472	2.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	MOLECULAR REPLACEMENT	THROUGHOUT	1.5	23.61	212639	208365	10451	97.99	0.175	0.174	0.194	RANDOM	16.681

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]
					-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.338
r_dihedral_angle_3_deg	11.519
r_dihedral_angle_4_deg	8.822
r_dihedral_angle_1_deg	3.789
r_scangle_it	2.095
r_scbond_it	1.391
r_sphericity_free	1.305
r_angle_refined_deg	1.191
r_sphericity_bonded	0.964
r_mcangle_it	0.869
r_rigid_bond_restr	0.801
r_mcbond_it	0.54
r_nbtor_refined	0.296
r_nbd_refined	0.184
r_symmetry_vdw_refined	0.165
r_symmetry_hbond_refined	0.105
r_xyhbond_nbd_refined	0.095
r_chiral_restr	0.072
r_bond_refined_d	0.006
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8436
Nucleic Acid Atoms
Solvent Atoms	1053
Heterogen Atoms	32

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing