2D25

C-C-A-G-G-C-M5C-T-G-G; HELICAL FINE STRUCTURE, HYDRATION, AND COMPARISON WITH C-C-A-G-G-C-C-T-G-G

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICRODIALYSIS	7.5	277	pH 7.50, MICRODIALYSIS, temperature 277.00K

Crystal Properties
Matthews coefficient	Solvent content
2.34	47.49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.77	α = 90
b = 53.77	β = 90
c = 34.35	γ = 120

Symmetry
Space Group	P 6

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

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR571

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	1.75	8				7209	4704		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		1.75	8	2	3799			0.174

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
n_sugar_angle_it	4.28
n_phos_angle_it	4.05
n_phos_bond_it	2.98
n_sugar_bond_it	2.82
n_multtor_nbd	0.2
n_singtor_nbd	0.143
n_chiral_restr	0.087
n_phos_bond_angle_d	0.064
n_phos_bond_d	0.045
n_sugar_bond_angle_d	0.04
n_plane_restr	0.025
n_sugar_bond_d	0.016
n_bond_d
n_angle_d
n_planar_d
n_hb_or_metal_coord
n_bond_angle_restr
n_dihedral_angle_restr
n_impr_tor
n_xhyhbond_nbd

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	404
Solvent Atoms	80
Heterogen Atoms	8

Software

Software
Software Name	Purpose
NUCLSQ	refinement