5DK6

CRYSTAL STRUCTURE OF A 5'-METHYLTHIOADENOSINE/S-ADENOSYLHOMOCYSTEINE (MTA/SAH) NUCLEOSIDASE (MTAN) FROM COLWELLIA PSYCHRERYTHRAEA 34H (CPS_4743, TARGET PSI-029300) IN COMPLEX WITH ADENINE AT 2.27 A RESOLUTION

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	292	Protein (37.95 mg/ml, 20 mM HEPES pH 7.5, 150 mM Sodium Chloride, 5% v/v Glycerol, 5 mM DTT) were combined with an equal volume of Reservoir (100 mM Bicine pH 8.0, 1.98 M Ammonium Sulfate, 135 mM Sodium Succinate, 4 mM Glycine, 15 mM CYMAL-7); Cryoprotection (75 mM Bicine pH 8.0, 1.49 M Ammonium Sulfate, 101 mM Sodium Succinate, 3 mM Glycine, 11 mM CYMAL-7)

Crystal Properties
Matthews coefficient	Solvent content
3.84	68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 145.427	α = 90
b = 145.427	β = 90
c = 70.341	γ = 120

Symmetry
Space Group	P 65 2 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	RAYONIX MX225HE	MIRRORS	2013-10-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 31-ID	0.97931	APS	31-ID

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	2.268	26	96.4	0.1	11.5	3.9		37023		-0.3	33.16

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	2.27	2.36	82.8		0.337	2.148	2

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	FREE R-VALUE	2.27	25.28	1.45	20433	1002	98.2	0.21	0.2082	0.2371	Random	43.6

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	18.474
f_angle_d	1.201
f_chiral_restr	0.043
f_bond_d	0.01
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1802
Nucleic Acid Atoms
Solvent Atoms	101
Heterogen Atoms	14

Software

Software
Software Name	Purpose
PHENIX	refinement
HKL-2000	data collection
SCALEPACK	data scaling
PDB_EXTRACT	data extraction
PHENIX	phasing
HKL-2000	data reduction

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.