7ZQN

d(CGCGCG)2 Z-DNA AT 5400 BARS (540 MPa)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	BATCH MODE	6.9	298	10 mg in 20 % MPD solution (cacodylate buffer + 0.01 M MgCl2)

Crystal Properties
Matthews coefficient	Solvent content
1.67	26.28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 17.87	α = 90
b = 30.9	β = 90
c = 43.76	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	CCD	ADSC QUANTUM 315r		2007-06-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A	0.75003	ESRF	BM30A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.41	25.1	77.4	0.118	0.047	0.99	7.8	5.8		3922

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.41	1.44	75.1		0.189	0.179	0.97	3.1	5.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	FREE R-VALUE	2ELG	1.41	22.45	3922	183	77.388	0.193	0.1918	0.2216	10.586

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]
-0.045			0.021		0.024

RMS Deviations
Key	Refinement Restraint Deviation
r_lrange_it	3.361
r_lrange_other	3.145
r_angle_refined_deg	2.427
r_scangle_it	2.323
r_scangle_other	2.32
r_scbond_it	1.479
r_scbond_other	1.479
r_angle_other_deg	0.513
r_nbtor_refined	0.279
r_xyhbond_nbd_refined	0.25
r_symmetry_xyhbond_nbd_refined	0.244
r_symmetry_nbd_other	0.228
r_chiral_restr	0.187
r_nbd_refined	0.158
r_nbd_other	0.153
r_symmetry_nbd_refined	0.095
r_symmetry_nbtor_other	0.081
r_gen_planes_refined	0.022
r_bond_refined_d	0.007
r_bond_other_d	0.006
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	240
Solvent Atoms	52
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
FFT	phasing