Experiment: 2B78

A putative sam-dependent methyltransferase from Streptococcus mutans

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	289	PEG8000, Sodium Cacodylate,Magnesium Acetates, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K
2	VAPOR DIFFUSION, HANGING DROP	6.5	289	PEG8000, Sodium Cacodylate,Magnesium Acetates, ethyl mercury thiosalicylate , pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 168.472	α = 90
b = 50.659	β = 104.22
c = 53.963	γ = 90

Symmetry
Space Group	C 1 2 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	CCD	BRUKER SMART 6000	MONTEL	2005-03-17	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	BRUKER SMART 6000	MONTEL	2005-03-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR591	1.5418
2	ROTATING ANODE	ENRAF-NONIUS FR591	1.5418

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	1.8	50	94.49	0.0503	11	4.54	58372	52534

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)
	1.8	1.91	74.1		0.1509	2.77

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SIRAS	2	50	41078	38816	5086	90	0.241	0.2487	0.259	0.2568	RANDOM	20.246

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]
1.084		1.445	-3.184		2.1

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3014
Nucleic Acid Atoms
Solvent Atoms	220
Heterogen Atoms

Software

Software
Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction
PROTEUM PLUS	data reduction
PROTEUM PLUS	data scaling
SOLVE	phasing