2EX4

Crystal Structure of Human methyltransferase AD-003 in complex with S-adenosyl-L-homocysteine

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9.5	300	Purified AD-003 was was complexed with S-adenosyl-L-homocysteine (SAH) (Sigma) at 1:5 molar ratio of protein:SAH and crystallized using the hanging drop vapor diffusion method at 20 C by mixing 1.5 l of the protein solution with 1.5 l of the reservoir solution containing 18% PEG 3350, 0.2 M KCl, 0.1 M glycine, pH 9.5., VAPOR DIFFUSION, HANGING DROP, temperature 300K

Crystal Properties
Matthews coefficient	Solvent content
2.12	42.02

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.922	α = 105.72
b = 47.367	β = 88.18
c = 64.734	γ = 115.97

Symmetry
Space Group	P 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	IMAGE PLATE	MARRESEARCH		2005-09-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA	1	SLS	X06SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.75	100	92.2			41514	41514

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.75	1.79	92.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1XTP	1.75	62.02	39433	39433	2071	91.85	0.19731	0.19731	0.19398	0.25789	RANDOM	23.848

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]
-0.8	-0.12	-0.03	0.38	0.1	0.38

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.778
r_dihedral_angle_4_deg	16.363
r_dihedral_angle_3_deg	13.595
r_dihedral_angle_1_deg	5.774
r_scangle_it	2.985
r_scbond_it	1.988
r_angle_refined_deg	1.345
r_mcangle_it	1.306
r_mcbond_it	0.839
r_symmetry_vdw_refined	0.306

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.778
r_dihedral_angle_4_deg	16.363
r_dihedral_angle_3_deg	13.595
r_dihedral_angle_1_deg	5.774
r_scangle_it	2.985
r_scbond_it	1.988
r_angle_refined_deg	1.345
r_mcangle_it	1.306
r_mcbond_it	0.839
r_symmetry_vdw_refined	0.306
r_nbtor_refined	0.303
r_nbd_refined	0.197
r_symmetry_hbond_refined	0.165
r_xyhbond_nbd_refined	0.141
r_chiral_restr	0.091
r_bond_refined_d	0.012
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3528
Nucleic Acid Atoms
Solvent Atoms	555
Heterogen Atoms	52

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
MOLREP	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.