3GE6

CRYSTAL STRUCTURE OF A PUTATIVE NITROREDUCTASE IN COMPLEX WITH FMN (EXIG_2970) FROM EXIGUOBACTERIUM SIBIRICUM 255-15 AT 1.85 A RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.6	277	0.2000M NH4H2PO3, 20.0000% PEG-3350, No Buffer pH 4.6, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.14	42.65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.97	α = 90
b = 81.3	β = 90
c = 93.79	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	MARMOSAIC 325 mm CCD	Flat collimating mirror, toroid focusing mirror	2008-12-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.85	29.185	98.6	0.097	6.79			35856		-3	17.089

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.85	1.92	97.5		0.578	1.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	SAD	THROUGHOUT	1.85	29.185	35802	1791	99.61	0.171	0.169	0.213	RANDOM	19.398

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]
-0.75			0.02		0.73

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.525
r_dihedral_angle_3_deg	13.81
r_dihedral_angle_4_deg	12.261
r_scangle_it	7.131
r_dihedral_angle_1_deg	6.862
r_scbond_it	5.015
r_mcangle_it	2.829
r_mcbond_it	2.134
r_angle_refined_deg	1.439
r_angle_other_deg	1.004
r_mcbond_other	0.577
r_symmetry_vdw_other	0.331
r_symmetry_vdw_refined	0.298
r_nbd_refined	0.207
r_nbd_other	0.197
r_nbtor_refined	0.175
r_symmetry_hbond_refined	0.155
r_xyhbond_nbd_refined	0.146
r_chiral_restr	0.087
r_nbtor_other	0.086
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3246
Nucleic Acid Atoms
Solvent Atoms	459
Heterogen Atoms	62

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SHELXD	phasing
autoSHARP	phasing