376D

A ZIPPER-LIKE DNA DUPLEX D(GCGAAAGCT)

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.3	36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 37.56	α = 90
b = 37.56	β = 90
c = 65.39	γ = 120

Symmetry
Space Group	P 63 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	276	IMAGE PLATE	MARRESEARCH	DOUBLE MONO + MULTILAYER FOCUS	1996-09-01	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	LURE BEAMLINE DW21B		LURE	DW21B

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	2.1	15	95	0.053	11.3			1832		3

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)
	2.1		61		0.148	4.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MAD AT BROMINE EDGE	MANUALLY BUILT IN THE EXPERIMENTAL DENSITY	2.1	15	1832	183	95	0.189	0.189	0.241

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
x_angle_deg	2.3
x_angle_d	0.023
x_bond_d	0.012
x_bond_d_na
x_bond_d_prot
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	184
Solvent Atoms	18
Heterogen Atoms	4

Software

Software
Software Name	Purpose
MADLSQ	model building
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
MADLSQ	phasing
CCP4	phasing