Experiment: 2F8W

Crystal structure of d(CACGTG)2

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1D48	PDB entry 1D48

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	291	7.5 mM sodium cacodylate, 2.5 mM SrCl2, 2.5 mM spermine, 50% Isopropanol, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
1.71	28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 18.42	α = 90
b = 30.74	β = 90
c = 43.18	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	291	DIFFRACTOMETER	ENRAF-NONIUS CAD4		1987-02-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	ENRAF-NONIUS	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.2	50	70	0.042			8124	5687	2	4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	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	THROUGHOUT	PDB entry 1D48	1.2	6	4	2	5687	93	70	0.183	0.183	0.18	0.1805	0.215	0.1638	RANDOM	14.8

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_dihedral_angle_deg	32.14
x_angle_deg	3.18
x_improper_angle_deg	1.32
x_bond_d	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	240
Solvent Atoms	71
Heterogen Atoms	19

Software

Software
Software Name	Purpose
CAD4	data collection
CAD4	data reduction
X-PLOR	model building
X-PLOR	refinement
CAD4	data scaling
X-PLOR	phasing