2FC2

NO-HEME complex in a bacterial nitric oxide synthase. An Fe(III)-NO may cause nitrosation.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	298	Peg8k, 5-10 K, K acetate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.07	59.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 82.738	α = 90
b = 96.175	β = 90
c = 129.547	γ = 90

Symmetry
Space Group	P 21 21 2

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 4			M	SINGLE WAVELENGTH
2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	CHESS BEAMLINE F1		CHESS	F1
2	SYNCHROTRON	NSLS BEAMLINE X25		NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.2	30						1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.2

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	2.2	27.02	42118	41523	2197	100	0.25936	0.27319	0.27357	RANDOM	55.128

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]
-2.61			-1.78		4.39

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.389
r_dihedral_angle_4_deg	19.458
r_dihedral_angle_3_deg	12.853
r_scangle_it	6.594
r_scbond_it	4.769
r_mcangle_it	2.847
r_angle_refined_deg	2.182
r_mcbond_it	2.023
r_dihedral_angle_1_deg	1.331
r_symmetry_vdw_refined	0.416
r_xyhbond_nbd_refined	0.382
r_nbd_refined	0.322
r_symmetry_hbond_refined	0.318
r_nbtor_refined	0.312
r_metal_ion_refined	0.29
r_chiral_restr	0.157
r_bond_refined_d	0.021
r_gen_planes_refined	0.021
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	5856
Nucleic Acid Atoms
Solvent Atoms	699
Heterogen Atoms	152

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
AMoRE	phasing