2OKF

CRYSTAL STRUCTURE OF A FDXN ELEMENT EXCISION CONTROLLING FACTOR PROTEIN (AVA_3312) FROM ANABAENA VARIABILIS AT 1.60 A RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.6	293	NANODROP, 0.2M (NH4)2SO4, 25.0% PEG 4000, 0.1M Acetate pH 4.6, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.36	47.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 59.81	α = 90
b = 59.81	β = 90
c = 73.19	γ = 120

Symmetry
Space Group	P 31

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 mirror (vertical focusing)	2006-12-18	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.91162, 0.97937, 0.97905	SSRL	BL11-1

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	1.6	25.898	96.3	0.037	12.07			38600			26.2

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	1.6	1.66	88.7		0.242	3.2		7224

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.6	25.898	38571	1937	99.64	0.143	0.143	0.142	0.155	RANDOM	24.211

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]
0.18	0.09		0.18		-0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.815
r_dihedral_angle_4_deg	18.322
r_dihedral_angle_3_deg	9.724
r_scangle_it	5.482
r_scbond_it	4.146
r_dihedral_angle_1_deg	3.803
r_mcangle_it	2.694
r_mcbond_it	2.082
r_angle_refined_deg	1.572
r_angle_other_deg	0.866
r_mcbond_other	0.421
r_symmetry_vdw_other	0.257
r_xyhbond_nbd_refined	0.225
r_nbd_refined	0.224
r_symmetry_vdw_refined	0.194
r_nbtor_refined	0.189
r_nbd_other	0.176
r_symmetry_hbond_refined	0.167
r_chiral_restr	0.101
r_nbtor_other	0.086
r_bond_refined_d	0.018
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2063
Nucleic Acid Atoms
Solvent Atoms	285
Heterogen Atoms	46

Software

Software
Software Name	Purpose
MolProbity	model building
SOLVE	phasing
REFMAC	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction