4E31

X-ray Structure of the Y76F mutant of TcaB9, a C-3'-Methyltransferase, in Complex with S-Adenosyl-L-Homocysteine and Sugar Product

X-RAY DIFFRACTION

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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
2.36	47.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.822	α = 90
b = 114.408	β = 90
c = 37.768	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	2011-12-31	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	1.75	34	97	0.084	0.084	9.6	3.4	45134	43793

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	1.75	1.85	92.8		0.255	0.255	2.69	1.86	6335

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	1.75	34	43752	41540	2212	97.07	0.16701	0.16501	0.20498	RANDOM	15.446

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]
-0.97			0.03		0.94

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.054
r_dihedral_angle_4_deg	19.942
r_dihedral_angle_3_deg	13.529
r_dihedral_angle_1_deg	6.225
r_scangle_it	6.087
r_scbond_it	4.05
r_mcangle_it	2.54
r_angle_refined_deg	2.257
r_mcbond_it	1.724
r_chiral_restr	0.154
r_bond_refined_d	0.01
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3154
Nucleic Acid Atoms
Solvent Atoms	426
Heterogen Atoms	70

Software

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