3ZXA

Structure and Assembly of Turnip Crinkle Virus I. X-ray Crystallographic Structure Analysis at 3.2 A Resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7		THE METHYL MERCURY ADDUCT WAS OBTAINED BY BRINGING STOCK SOLUTION OF VIRUS (3.5% TCV (W/V) IN 0.01% SODIUM AZIDE,) TO 6 EQUIVALENT METHYL MERCURY/PROTEIN SUBUNIT BY ADDITION OF 15 MILLIMOLAR-METHYL MERCURY NITRATE AND INCUBATING FOR 1 H. CRYSTALLIZATION WAS THEN INITIATED BY ADDITION OF AN APPROXIMATELY EQUAL VOLUME OF SATURATED SODIUM CITRATE (PH 7.0) AND ALLOWED TO PROCEED UNDISTURBED FOR 2 TO 4 MONTHS. THE OPTIMUM CONCENTRATION OF SODIUM CITRATE REQUIRED TO PRODUCE LARGE CRYSTALS VARIED FROM EXPERIMENT TO EXPERIMENT BUT WAS GENERALLY IN THE RANGE 42 TO 46% SATURATED.

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 348.8	α = 90
b = 379.1	β = 90
c = 397.4	γ = 90

Symmetry
Space Group	I 2 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	FILM	KODAK NO-SCREEN X-RAY FILM	FRANKS MIRROR OPTICS		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-6	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	3.2	100	73	0.18		2.2		310000

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	TBSV	3.2	100	680000

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2237
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
OPTRONICS	data reduction
DIGITAL	data reduction
SCAN12	data reduction
HARVARD	data scaling
COMBINE	phasing
FFT	phasing
BILDER	refinement

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.