1F5V

STRUCTURE AND SITE-DIRECTED MUTAGENESIS OF A FLAVOPROTEIN FROM ESCHERICHIA COLI THAT REDUCES NITROCOMPOUNDS. ALTERATION OF PYRIDINE NUCLEOTIDE BINDING BY A SINGLE AMINO ACID SUBSTITUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	281	PEG 6000, MES, sodium hydroxide, PEG 400, dioxane, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 281.0K
2	VAPOR DIFFUSION, SITTING DROP	6.5	281	PEG 6000, MES, sodium hydroxide, PEG 400, dioxane, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 281.0K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.56	α = 75.79
b = 52.86	β = 60.71
c = 52.83	γ = 61.17

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IIC			M	SINGLE WAVELENGTH
2	1	100	IMAGE PLATE	FUJI		1998-11-20

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200
2	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-6A		Photon Factory	BL-6A

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		1.7	7	42534			0.189	0.206	RANDOM

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_angle_deg	1.69
x_bond_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3774
Nucleic Acid Atoms
Solvent Atoms	349
Heterogen Atoms	62

Software

Software
Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling