2QS7

CRYSTAL STRUCTURE OF a putative oxidoreductase of the DsrE/DsrF-like family (SSO1126) FROM SULFOLOBUS SOLFATARICUS P2 AT 2.09 A RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		293	NANODROP, 23.1% PEG 3350, 0.193M Potassium dihydrogen phosphate, VAPOR DIFFUSION, SITTING DROP, temperature 293K
2	VAPOR DIFFUSION, SITTING DROP		293	NANODROP, 22.2% PEG 3350, 0.193M Potassium dihydrogen phosphate, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 112.36	α = 90
b = 112.36	β = 90
c = 293.284	γ = 120

Symmetry
Space Group	H 3 2

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)	2007-06-30	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	MARMOSAIC 325 mm CCD	Flat mirror (vertical focusing)	2007-06-30	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	1.00000	SSRL	BL11-1
2	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.91837, 0.97937	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
1,2	2.09	48.737	98.9	0.066	21.12			42142		-3	48.55

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)
1,2	2.09	2.16	88.8		0.801	2.24

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	2.09	48.737	42142	2098	99.62	0.177	0.177	0.176	0.203	RANDOM	49.899

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]
0.62	0.31		0.62		-0.94

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.706
r_dihedral_angle_3_deg	13.377
r_dihedral_angle_4_deg	10.252
r_scangle_it	6.971
r_scbond_it	5.237
r_dihedral_angle_1_deg	3.122
r_mcangle_it	2.695
r_mcbond_it	1.977
r_angle_refined_deg	1.562
r_angle_other_deg	1.048
r_symmetry_hbond_refined	0.333
r_mcbond_other	0.323
r_symmetry_vdw_other	0.297
r_nbd_refined	0.231
r_xyhbond_nbd_refined	0.202
r_nbtor_refined	0.191
r_nbd_other	0.187
r_symmetry_vdw_refined	0.13
r_chiral_restr	0.101
r_nbtor_other	0.091
r_bond_refined_d	0.017
r_gen_planes_refined	0.006
r_bond_other_d	0.003
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4222
Nucleic Acid Atoms
Solvent Atoms	85
Heterogen Atoms	33

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
MAR345	data collection
XDS	data reduction
SHELXD	phasing
autoSHARP	phasing