Experiment: 8A8O

PAPS reductase from Methanothermococcus thermolithotrophicus refined to 1.45 A

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	293	Purified PAPS reductase from Methanothermococcus thermolithotrophicus at a concentration of 20 mg.ml-1 was anaerobically crystallized inside a Coy tent (N2/H2 at a 96:4 ratio) under yellow light condition. 0.7 ul of PAPSR in 25 mM Tris/HCl pH 7.6, 2 mM dithiothreitol, 0.5 mM FAD, and 10 % v/v glycerol was mixed with 0.7 ul reservoir solution. The drops were spotted in a 96-Well MRC 2-drop crystallization plates in polystyrene (SWISSCI) containing 90 ul of crystallization solution in the reservoir. Crystals appeared after a few days in the following crystallization condition: 35 % v/v 2-Methyl-2,4-pentanediol, 100 mM Tris pH 7.0 and 200 mM NaCl. Prior to transfer to liquid nitrogen, the crystal was soaked in 10 mM disodium 3'-Phosphoadenosine 5'-phosphate for 7 min.

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.84

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.714	α = 90
b = 123.65	β = 104.44
c = 88.842	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	PIXEL	DECTRIS PILATUS 2M-F		2021-04-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06DA	0.97625	SLS	X06DA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	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	1.45	86.04	95	0.079	0.086	0.033	0.997	11.9	6.8		146296			19.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.45	1.64	73.8		1.056	1.139	0.425	0.567	1.7	7.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	AB INITIO PHASING	THROUGHOUT	1.45	52.04	1.36	146283	7256	62.29	0.1527	0.1514	0.1598	0.178	0.1821	32.1826

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10278
Nucleic Acid Atoms
Solvent Atoms	879
Heterogen Atoms	223

Software

Software
Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
autoPROC	data reduction
autoPROC	data scaling
CRANK2	phasing