7M2T

Crystallographic Structure of the Monoclinic Form of Satellite Tobacco Mosaic Virus

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4OQ8

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	279	Crystals grown by vapor diffusion as sitting drops. Drops were equal volumes of a 6 mg/ml STMV stock solution buffered at pH 6.5 with 0.1 M phosphate. The reservoirs were 16% saturated ammonium sulfate in 0.1 M phosphate at pH 6.5. Drops were 6 to 8 ul with 0.60 ml reservoirs. Crystals were grown at 4 degrees C over a weeks time.

Crystal Properties
Matthews coefficient	Solvent content
1.74	29.43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 175.76	α = 90
b = 169.86	β = 92.69
c = 244.56	γ = 90

Symmetry
Space Group	I 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	298	AREA DETECTOR	SDMS		1992-06-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.54

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Rpim I (All)	CC (Half)	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	2.7	49.95	91.8	0.0691	0.0675	0.036	0.998	9.27	8.2		179156		2	20.1

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	2.7	2.8	58.8		0.134	0.127	5.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	4OQ8	2.71	49.95	0.04	179135	8864	91.79	0.1316	0.1292	0.1767	25.2683

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	10.516
f_angle_d	0.529
f_chiral_restr	0.042
f_plane_restr	0.006
f_bond_d	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	33540
Nucleic Acid Atoms	13353
Solvent Atoms	2797
Heterogen Atoms	157

Software

Software
Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
SDMS	data reduction
Aimless	data scaling
PHASER	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.