Experiment: 3NQS

Crystal Structure of Inducible Nitric Oxide Synthase with N-Nitrosated-pterin

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3E7M	PDB ENTRY 3E7M

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.3	278	25% Li2SO4, 5% BOG, 50 mM MES, 50 mM CysNO, pH 5.3, VAPOR DIFFUSION, HANGING DROP, temperature 278K

Crystal Properties
Matthews coefficient	Solvent content
3.96	68.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 214.114	α = 90
b = 214.114	β = 90
c = 116.542	γ = 120

Symmetry
Space Group	P 61 2 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 315r		2000-01-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1	0.98	SSRL	BL7-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.2	20	94	0.115	21	4	77889	77889			25.3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.17	2.25	74.6		0.415	2.5	4	6090

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 (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3E7M	2.2	19.11	77889	74686	3728	93.9	0.204	0.204	0.204	0.1986	0.229	0.2204	RANDOM	45.2

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]
-10.08			-10.08		20.16

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.8
c_scangle_it	3.06
c_mcangle_it	2.1
c_scbond_it	2.1
c_mcbond_it	1.31
c_angle_deg	1.2
c_improper_angle_d	1.15
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6710
Nucleic Acid Atoms
Solvent Atoms	598
Heterogen Atoms	225

Software

Software
Software Name	Purpose
ADSC	data collection
XFIT	data reduction
CNS	refinement
DENZO	data reduction
HKL-2000	data scaling