1VLM

Crystal structure of SAM-dependent methyltransferase, possible histamine N-methyltransferase (TM1293) from Thermotoga maritima at 2.20 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION,SITTING DROP,NANODROP		277	20.00% NP_Isopropanol, 0.034M Na/K-Phosphate pH5.0, 0.066M Na/K-Phosphate pH 7.0, 5.00% Glycerol, 20.00% NP_PEG 4000 , VAPOR DIFFUSION,SITTING DROP,NANODROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.648	α = 90
b = 70.734	β = 90
c = 93.922	γ = 90

Symmetry
Space Group	P 21 21 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		2003-12-12	M	SINGLE WAVELENGTH
2	1	x-ray		M	MAD
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1		ALS	8.2.1
2	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.0032,0.9796,0.9794	ALS	8.2.1

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
1,2	2.2	53.81	98.4	0.09	9.9	3.5		22405			42.02

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)
1,2	2.2	2.26	92.1		0.514	2	3	1500

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	MAD	THROUGHOUT	2.2	53.81	21451	1148	100	0.1943	0.19162	0.2461	RANDOM	37.296

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]
-0.37			-0.4		0.76

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.502
r_dihedral_angle_4_deg	19.056
r_dihedral_angle_3_deg	15.566
r_scangle_it	7.898
r_dihedral_angle_1_deg	5.637
r_scbond_it	5.469
r_mcangle_it	2.97
r_mcbond_it	1.651
r_angle_refined_deg	1.445
r_angle_other_deg	0.846
r_mcbond_other	0.411
r_symmetry_vdw_other	0.243
r_nbd_refined	0.208
r_nbtor_refined	0.185
r_xyhbond_nbd_refined	0.181
r_nbd_other	0.179
r_symmetry_vdw_refined	0.119
r_metal_ion_refined	0.089
r_nbtor_other	0.086
r_chiral_restr	0.085
r_symmetry_hbond_refined	0.079
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_bond_other_d	0.002
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3250
Nucleic Acid Atoms
Solvent Atoms	109
Heterogen Atoms	1

Software

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