Experiment: 4FS6

Crystal structure of the Z-DNA hexamer CGCGCG at 500 mM CaCl2

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	TEMPERATURE CONTROL	7	293	2.0mM DNA, 20mM Na cacodylate, 30% 2-methyl-2,4-pentanediol, 500mM CaCl2, pH 7.0, TEMPERATURE CONTROL, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.94	36.66

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 18.461	α = 90
b = 18.461	β = 90
c = 71.463	γ = 120

Symmetry
Space Group	P 32 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	100	CCD	ADSC QUANTUM 315		2008-02-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL38B1	1	SPring-8	BL38B1

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	1.3	36	99.2	0.072		6.6	3879	3859			7.49

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	1.3	1.47	99.7		0.051		8.2	539

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	1.3	23.821	2.92	3832	168	98.79	0.1951	0.1895	0.1926	0.23	0.2001	RANDOM	12.72

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]
0.5118			0.5118		-1.0236

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	29.929
f_angle_d	1.862
f_chiral_restr	0.073
f_bond_d	0.014
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	120
Solvent Atoms	41
Heterogen Atoms	7

Software

Software
Software Name	Purpose
BSS	data collection
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling