4JXJ

Crystal Structure of Ribosomal RNA small subunit methyltransferase A from Rickettsia bellii Determined by Iodide SAD Phasing

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	289	Wizard3/4(F6): 25% PEG-1500, 0.1M SPG Buffer, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.05	39.92

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.38	α = 90
b = 81.33	β = 90
c = 38.49	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	RIGAKU SATURN 944+	Rigaku Varimax HF	2013-02-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU FR-E+ SUPERBRIGHT	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	50	99.4	0.09	14.52		32923	32726		-3	28.575

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.05	92.7		0.37	3.45

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD	THROUGHOUT	2	50	32923	32726	888	99.28	0.2124	0.2124	0.2096	0.2649	RANDOM	25.956

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]
-0.89			1.86		-0.97

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.485
r_dihedral_angle_4_deg	16.201
r_dihedral_angle_3_deg	13.5
r_dihedral_angle_1_deg	6.899
r_mcangle_it	1.514
r_angle_refined_deg	1.51
r_mcbond_it	0.92
r_mcbond_other	0.912
r_angle_other_deg	0.804
r_chiral_restr	0.084

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.485
r_dihedral_angle_4_deg	16.201
r_dihedral_angle_3_deg	13.5
r_dihedral_angle_1_deg	6.899
r_mcangle_it	1.514
r_angle_refined_deg	1.51
r_mcbond_it	0.92
r_mcbond_other	0.912
r_angle_other_deg	0.804
r_chiral_restr	0.084
r_bond_refined_d	0.011
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1843
Nucleic Acid Atoms
Solvent Atoms	153
Heterogen Atoms	16

Software

Software
Software Name	Purpose
XSCALE	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
StructureStudio	data collection
XDS	data reduction
PHENIX	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 R01GM133198.