1NS9

The 1.6A Structure of Horse Methemoglobin at pH 7.1

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7.1	298	1.5M ammonium sulfate, 0.35 M ammonium phosphate, pH 7.1, VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.62	52.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 108.4	α = 90
b = 63.2	β = 110.9
c = 54.6	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	AREA DETECTOR	UCSD MARK II		1997-09-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	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	1.6	30	92.3	0.047				42596		1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	1.6	53.45	2	42596	4200	93.51	0.17996	0.17992	0.17992	0.195	random	22.954

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]
0.37		0.9	-0.08		0.36

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	17.486
r_scangle_it	3.863
r_dihedral_angle_1_deg	3.096
r_scbond_it	2.341
r_mcangle_it	1.538
r_angle_refined_deg	1.168
r_mcbond_it	0.758
r_angle_other_deg	0.69
r_symmetry_hbond_other	0.346
r_symmetry_hbond_refined	0.287
r_symmetry_vdw_refined	0.277
r_nbd_refined	0.227
r_symmetry_vdw_other	0.202
r_nbd_other	0.184
r_xyhbond_nbd_refined	0.155
r_chiral_restr	0.071
r_bond_refined_d	0.012
r_gen_planes_refined	0.005
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2203
Nucleic Acid Atoms
Solvent Atoms	90
Heterogen Atoms	86

Software

Software
Software Name	Purpose
REFMAC	refinement
SDMS	data reduction
CNS	refinement
SDMS	data collection
SDMS	data scaling
CNS	phasing