5EPE

Crystal structure of SAM-dependent methyltransferase from Thiobacillus denitrificans in complex with S-Adenosyl-L-homocysteine

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	9.5	289	0.2 ul of 15 mg/ml protein in 20 mM HEPES pH 7.5, 150 mM NaCl, 10% Glycerol, 0.1% Sodium Azide and 0.5 mM TCEP were mixed with 0.2 ul of the MCSG II condition #56 (0.1M CHES pH=9.5, 20%w/v PEG 4K) and equilibrated against 1.5 M NaCl solution in 96 Well 3 drop Crystallization Plate (Swissci). Before crystallization protein was incubated with 1/50 v/v of 1 mg/ml TEV solution at 289 K for 3 hours

Crystal Properties
Matthews coefficient	Solvent content
2.97	58.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 157.536	α = 90
b = 157.536	β = 90
c = 157.536	γ = 90

Symmetry
Space Group	F 2 3

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 300 mm CCD	Beryllium Lenses	2015-04-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-G	0.97856	APS	21-ID-G

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Rrim I (All)	Rpim I (All)	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	1.9	50	100	0.1	0.1	0.105	0.031	5.6	11.4	25623	25623		-3	25.4

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	1.9	1.93	100		0.914	0.96	0.292	0.81	2	10.7	1254

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	1.9	50	24340	1266	99.97	0.1371	0.1356	0.1671	RANDOM	32.68

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
r_dihedral_angle_2_deg	39.679
r_dihedral_angle_4_deg	19.522
r_dihedral_angle_3_deg	12.367
r_dihedral_angle_1_deg	6.349
r_mcangle_it	1.767
r_angle_refined_deg	1.717
r_mcbond_it	1.106
r_mcbond_other	1.095
r_angle_other_deg	0.987
r_chiral_restr	0.106

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.679
r_dihedral_angle_4_deg	19.522
r_dihedral_angle_3_deg	12.367
r_dihedral_angle_1_deg	6.349
r_mcangle_it	1.767
r_angle_refined_deg	1.717
r_mcbond_it	1.106
r_mcbond_other	1.095
r_angle_other_deg	0.987
r_chiral_restr	0.106
r_bond_refined_d	0.017
r_gen_planes_refined	0.008
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1893
Nucleic Acid Atoms
Solvent Atoms	276
Heterogen Atoms	27

Software

Software
Software Name	Purpose
BLU-MAX	data collection
HKL-3000	data scaling
HKL-3000	phasing
SHELX	phasing
DM	phasing
MLPHARE	phasing
REFMAC	refinement
Coot	model building
PDB_EXTRACT	data extraction
HKL-3000	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.