6HN3

wildtype form (apo) of human GPX4 with Se-Cys46

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	298	Protein 17.6 mg/ml in 0.050 M TRIS-HCL PH 8.0, 0.15 M NACL, 0.005 M TCEP. Reservoir solution 0.1 M MES PH 6.0, 18% (w/v) PEG 3350, 5% (v/v) ethanol. Cryo buffer was reservoir buffer supplemented with 15% glycerol

Crystal Properties
Matthews coefficient	Solvent content
1.91	35.61

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 32.76	α = 103.18
b = 35.19	β = 112.33
c = 37.82	γ = 91.76

Symmetry
Space Group	P 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	PIXEL	DECTRIS PILATUS3 S 6M		2017-03-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.1	0.9184	BESSY	14.1

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	1.01	33.97	94.7	0.036	14.6	2.8		79169

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)
1	1.01	1.03	85.6		0.523	1.8	1.51

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	2OBI	1.01	33.97	71219	3749	94.7	0.115	0.114	0.137	RANDOM	14.34

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]
-0.96	0.46	0.64	-0.12	0.27	0.23

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.011
r_sphericity_free	16.796
r_dihedral_angle_4_deg	16.192
r_dihedral_angle_3_deg	14.476
r_sphericity_bonded	6.424
r_dihedral_angle_1_deg	5.755
r_rigid_bond_restr	2.504
r_angle_refined_deg	1.877
r_angle_other_deg	1.175
r_chiral_restr	0.144
r_bond_refined_d	0.016
r_gen_planes_refined	0.01
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1347
Nucleic Acid Atoms
Solvent Atoms	245
Heterogen Atoms	14

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing