2PEB

Crystal structure of a putative dioxygenase (npun_f1925) from nostoc punctiforme pcc 73102 at 1.46 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5	277	NANODROP, 0.2M Ammonium citrate (dibasic), 20.0% PEG 3350, No Buffer pH 5.0, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.08	41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 44.562	α = 90
b = 57.042	β = 104.81
c = 46.676	γ = 90

Symmetry
Space Group	P 1 21 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	CCD	MARMOSAIC 325 mm CCD	Flat mirror (vertical focusing)	2007-03-12	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.91837, 0.97944, 0.97913	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	1.46	35.4	93.9	0.061	8.08			37036			18.74

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	1.46	1.51	81.1		0.479	1.61		2759

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	1.46	35.4	37018	1866	94.07	0.186	0.186	0.185	0.213	RANDOM	23.361

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]
0.17		-0.33	-1.43		1.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.207
r_dihedral_angle_4_deg	13.606
r_dihedral_angle_3_deg	12.943
r_dihedral_angle_1_deg	7.173
r_scangle_it	6.677
r_scbond_it	4.582
r_mcangle_it	2.732
r_mcbond_it	1.937
r_angle_refined_deg	1.493
r_angle_other_deg	0.941
r_mcbond_other	0.511
r_symmetry_vdw_refined	0.322
r_metal_ion_refined	0.308
r_symmetry_vdw_other	0.253
r_nbd_refined	0.23
r_nbd_other	0.195
r_nbtor_refined	0.184
r_xyhbond_nbd_refined	0.159
r_symmetry_hbond_refined	0.1
r_chiral_restr	0.097
r_nbtor_other	0.087
r_bond_refined_d	0.015
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	1814
Nucleic Acid Atoms
Solvent Atoms	227
Heterogen Atoms	42

Software

Software
Software Name	Purpose
MolProbity	model building
SHELX	phasing
REFMAC	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
MAR345	data collection
SHARP	phasing