Experiment: 417D

A THYMINE-LIKE BASE ANALOGUE FORMS WOBBLE PAIRS WITH ADENINE

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		Z-DNA hexamer d(CGCGPG)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	277	CRYSTALS WERE OBTAINED FROM A SOLUTION THAT CONTAINED NA CACODYLATE, MG CHLORIDE, SPERMINE, MPD., pH 6.50, VAPOR DIFFUSION, SITTING DROP, temperature 277.00K

Crystal Properties
Matthews coefficient	Solvent content
1.65	35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 17.338	α = 90
b = 31.432	β = 90
c = 44.486	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	150	IMAGE PLATE	MARRESEARCH		1995-10-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7B		EMBL/DESY, HAMBURG	BW7B

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	1.53	10	97.5	0.086	21.08	5.2	3920	3920

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)
	1.53	1.56	92.5		0.104	11.92

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	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 Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB	1.5	10	4	3920	3696		97.5	0.156	0.15	0.155	0.2102	0.25	CCP4

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
s_non_zero_chiral_vol	0.083
s_approx_iso_adps	0.058
s_from_restr_planes	0.041
s_similar_dist	0.02
s_similar_adp_cmpnt	0.02
s_bond_d	0.014
s_angle_d	0.014
s_rigid_bond_adp_cmpnt	0.004
s_zero_chiral_vol
s_anti_bump_dis_restr

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	244
Solvent Atoms	58
Heterogen Atoms

Software

Software
Software Name	Purpose
AMoRE	phasing
SHELXL-93	refinement
DENZO	data reduction
CCP4	data scaling
ROTAVATA	data scaling