115D

ORDERED WATER STRUCTURE IN AN A-DNA OCTAMER AT 1.7 ANGSTROMS RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7		pH 7.00, VAPOR DIFFUSION

Crystal Properties
Matthews coefficient	Solvent content
2.39	48.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.084	α = 90
b = 45.084	β = 90
c = 41.72	γ = 120

Symmetry
Space Group	P 61

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		DIFFRACTOMETER	ENRAF-NONIUS CAD4			M
2	1	x-ray		OSCILLATION CAMERA	PHILLIPS			M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE
2	SYNCHROTRON	LURE		LURE

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.7						4669	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	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		1.7	10	2	4428			0.14

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
Nucleic Acid Atoms	318
Solvent Atoms	85
Heterogen Atoms	4

Software

Software
Software Name	Purpose
NUCLSQ	refinement