3FNI

Crystal structure of a diflavin flavoprotein A3 (all3895) from Nostoc sp., Northeast Structural Genomics Consortium Target NsR431A

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	Microbatch under oil	7.5	277	Protein solution: 10 mM Tris (pH 7.5), 100 mM sodium chloride, and 5 mM DTT. Reservoir solution:100 mM HEPES (pH 7.5), 40% PEG 4k, and 100 mM Magnesium Acetate. , Microbatch under oil, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.05	40.06

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 28.096	α = 90
b = 66.301	β = 90
c = 75.15	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 4	mirrors	2008-12-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X4A	0.96863	NSLS	X4A

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	2.3	20	98.7	0.08	0.075	25.44	6.8	12344	12184			16.4

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)
1	2.3	2.38	100		0.169	0.157	12.4	6.7	1235

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	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	SAD	THROUGHOUT	2.3	20	2	2	12038	11425	586	94.9	0.212	0.21	0.21	0.252	RANDOM	26.7

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]
-8.63			19.53		-10.9

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.6
c_angle_deg	1.1
c_improper_angle_d	0.71
c_bond_d	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1148
Nucleic Acid Atoms
Solvent Atoms	141
Heterogen Atoms

Software

Software
Software Name	Purpose
ADSC	data collection
SHELX	model building
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SHELX	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.