1O54

Crystal structure of SAM-dependent O-methyltransferase (TM0748) from Thermotoga maritima at 1.65 A resolution

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1I9G

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION,SITTING DROP,NANODROP	5	293	40% MPD, 0.1M sodium acetate trihydrate, pH 5.0, VAPOR DIFFUSION,SITTING DROP,NANODROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.57	51.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.253	α = 90
b = 74.992	β = 90
c = 143.701	γ = 90

Symmetry
Space Group	I 2 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	ADSC QUANTUM 315	flat mirror	2003-06-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1		SSRL	BL11-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.65	35.93	95.9	0.055	17.4	4.7	40334	40334			31.78

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.65	1.74	78.8		0.433	1.9	2.2	4754

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	1I9G	1.65	35.93	38297	2036	95.7	0.15918	0.15768	0.18762	RANDOM	27.161

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]
0.67			1.31		-1.98

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.186
r_dihedral_angle_3_deg	14.127
r_dihedral_angle_4_deg	12.53
r_dihedral_angle_1_deg	5.544
r_scangle_it	4.32
r_scbond_it	2.522
r_mcangle_it	1.759
r_angle_refined_deg	1.409
r_mcbond_it	0.959
r_angle_other_deg	0.755
r_symmetry_hbond_refined	0.26
r_symmetry_vdw_other	0.245
r_xyhbond_nbd_refined	0.236
r_nbd_refined	0.21
r_symmetry_vdw_refined	0.2
r_nbd_other	0.181
r_chiral_restr	0.083
r_nbtor_other	0.082
r_bond_refined_d	0.015
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2090
Nucleic Acid Atoms
Solvent Atoms	295
Heterogen Atoms	1

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
CCP4	data scaling