2Q32

Crystal structure of human heme oxygenase-2 C127A (HO-2)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1N45	PDB entry 1N45

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	277	Protein solution (5 mg/ml Protein, 0.050 M Potassium chloride, 0.005 M Tris-HCl pH 8.5) mixed in a 1.5:1 ratio with the well solution (40% PEG 1500, 0.20 M Potassium glutamate, 0.10 M Triethanolamine, pH 8.5). Cryoprotected with well solution, VAPOR DIFUSSION, HANGING DROP, temperature 277K, VAPOR DIFFUSION, HANGING DROP

Crystal Properties
Matthews coefficient	Solvent content
2.6	52.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 75.769	α = 90
b = 86.017	β = 90
c = 97.753	γ = 90

Symmetry
Space Group	P 21 21 21

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	MARMOSAIC 300 mm CCD	Adjustable focusing mirrors in K-B geometry	2007-04-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-D	0.97933	APS	23-ID-D

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	2.3	49.148	95.9	0.082	13.505	7.3		28128

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	2.3	2.38	78.2		0.608	1.929	3.9	2245

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	PDB entry 1N45	2.4	49.148	25217	1275	98.431	0.204	0.201	0.253	RANDOM	59.622

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]
-2.315			-1.049		3.364

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.67
r_dihedral_angle_4_deg	22.585
r_dihedral_angle_3_deg	16.946
r_dihedral_angle_1_deg	5.145
r_scangle_it	1.966
r_angle_refined_deg	1.255
r_scbond_it	1.232
r_mcangle_it	0.799
r_mcbond_it	0.514
r_nbtor_refined	0.294
r_symmetry_hbond_refined	0.286
r_nbd_refined	0.198
r_xyhbond_nbd_refined	0.155
r_symmetry_vdw_refined	0.103
r_chiral_restr	0.083
r_bond_refined_d	0.011
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3538
Nucleic Acid Atoms
Solvent Atoms	154
Heterogen Atoms	70

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
HKL-2000	data reduction
HKL-2000	data scaling