2QU0

Crystal structure determination of sheep methemoglobin at 2.7 Angstrom resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	293	20% PEG 3350, Unbuffered condition, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.25	45.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.231	α = 90
b = 70.695	β = 90
c = 131.479	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	293	IMAGE PLATE	MAR scanner 345 mm plate	NIL	2006-08-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5418

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	2.7	30	95.7	0.1351	3.9	3.1	15460	15460

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.7	2.8	97			3.05	1538

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB ENTRY 1G08	2.7	14.89	13814	13814	1537	96.52	0.201	0.19517	0.25441	RANDOM	40.255

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]
0.02			-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	41.935
r_dihedral_angle_3_deg	20.808
r_dihedral_angle_4_deg	17.402
r_dihedral_angle_1_deg	6.097
r_scangle_it	2.568
r_scbond_it	1.761
r_angle_refined_deg	1.485
r_mcangle_it	1.198
r_mcbond_it	0.855
r_nbtor_refined	0.31
r_nbd_refined	0.246
r_symmetry_vdw_refined	0.225
r_xyhbond_nbd_refined	0.157
r_chiral_restr	0.107
r_metal_ion_refined	0.083
r_symmetry_hbond_refined	0.076
r_bond_refined_d	0.013
r_gen_planes_refined	0.004
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4394
Nucleic Acid Atoms
Solvent Atoms	27
Heterogen Atoms	172

Software

Software
Software Name	Purpose
REFMAC	refinement
AUTOMAR	data reduction
AMoRE	phasing