3N6A

Structure of endothelial nitric oxide synthase N368D/V106M double mutant heme domain complexed with 4-(2-(5-(2-(6-amino-4-methylpyridin-2-yl)ethyl)pyridin-3-yl)ethyl)-6-methylpyridin-2-amine

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	278	9-12% PEG 3350, 0.2M magnesium acetate, 0.1M sodium cacodylate, 0.005M TCEP-HCl , pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 278K

Crystal Properties
Matthews coefficient	Solvent content
2.44	49.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.071	α = 90
b = 106.614	β = 90
c = 156.886	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	ADSC QUANTUM 315r	mirrors	2009-03-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1	1.0	SSRL	BL7-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.5	50	99.5	0.103	0.103	12.18	3.6		34483		-3	50.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.5	2.54	95.3		0.6	0.6	1.6	3.3	1683

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	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	FOURIER SYNTHESIS	THROUGHOUT	2.49	42.76	3	32727	1702	98.82	0.18667	0.18373	0.24334	RANDOM	42.641

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]
0.15			-0.16

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.923
r_dihedral_angle_4_deg	20.258
r_dihedral_angle_3_deg	17.544
r_dihedral_angle_1_deg	6.182
r_scangle_it	3.244
r_scbond_it	1.949
r_angle_refined_deg	1.47
r_mcangle_it	1.138
r_mcbond_it	0.583
r_chiral_restr	0.088

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.923
r_dihedral_angle_4_deg	20.258
r_dihedral_angle_3_deg	17.544
r_dihedral_angle_1_deg	6.182
r_scangle_it	3.244
r_scbond_it	1.949
r_angle_refined_deg	1.47
r_mcangle_it	1.138
r_mcbond_it	0.583
r_chiral_restr	0.088
r_bond_refined_d	0.013
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6438
Nucleic Acid Atoms
Solvent Atoms	154
Heterogen Atoms	193

Software

Software
Software Name	Purpose
REFMAC	refinement
CNS	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.