4E2W

X-ray Structure of the H181N mutant of TcaB9, a C-3'-Methyltransferase, in Complex with S-Adenosyl-L-Homocysteine and Sugar Product

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	1.2-1.6 M sodium/potassium phosphate, 10 mM dTMP, 5 mM S-adenosyl-L-homocysteine, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.37	48.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.631	α = 90
b = 114.891	β = 90
c = 37.839	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	Bruker Platinum 135	Montel	2011-03-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.54178

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.5	38	97.9	0.084	0.084	11.2	4.7	71732	70194

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.5	1.6	90.6		0.291	0.291	2.77	1.96	11310

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3NDJ	1.5	38	70189	66622	3567	98.14	0.1905	0.18852	0.22767	RANDOM	12.769

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]
-0.57			-0.32		0.9

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.468
r_dihedral_angle_4_deg	18.641
r_dihedral_angle_3_deg	13.003
r_dihedral_angle_1_deg	6.232
r_scangle_it	5.718
r_scbond_it	3.742
r_mcangle_it	2.468
r_angle_refined_deg	2.282
r_mcbond_it	1.685
r_chiral_restr	0.158

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.468
r_dihedral_angle_4_deg	18.641
r_dihedral_angle_3_deg	13.003
r_dihedral_angle_1_deg	6.232
r_scangle_it	5.718
r_scbond_it	3.742
r_mcangle_it	2.468
r_angle_refined_deg	2.282
r_mcbond_it	1.685
r_chiral_restr	0.158
r_bond_refined_d	0.01
r_gen_planes_refined	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3153
Nucleic Acid Atoms
Solvent Atoms	441
Heterogen Atoms	74

Software

Software
Software Name	Purpose
PROTEUM PLUS	data collection
PHASER	phasing
REFMAC	refinement
SAINT	data reduction
SADABS	data scaling

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 R01GM133198.