Experiment: 2GWQ

Crystal structure of D(G4T4G4) with four quadruplexes in the asymmetric unit.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1JRN	DNA PART OF NDB ENTRY CODE UD0014 OR PDB ENTRY CODE 1JRN.

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5	285	MAGNESIUM CHLORIDE, DNA, POTASSIUM CHLORIDE, MPD, PEPTIDE CONJUGATE BIS RKKV ACRIDONE, SPERMINE TETRAHYDROCHLORIDE, POTASSIUM CACODYLATE BUFFER, VAPOR DIFFUSION, HANGING DROP, temperature 285K, pH 6.50

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.332	α = 90
b = 53.47	β = 90
c = 97.469	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	100	CCD	ADSC QUANTUM 210	A CYLINDRICAL GRAZING INCIDENCE MIRROR	2003-04-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29		ESRF	ID29

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	17	96.6	0.091	26.27	3.35		18992		-2

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	2	2.07	96.8		0.197	8.74

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	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	DNA PART OF NDB ENTRY CODE UD0014 OR PDB ENTRY CODE 1JRN.	2	8	4	18520	1850	91.8	0.233	0.231		0.2287	0.299	0.289	RANDOM	17.84

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]

Coordinate Error
Structure Solution Method	Refinement High Resolution	Refinement Low Resolution
		2213

RMS Deviations
Key	Refinement Restraint Deviation
s_similar_adp_cmpnt	0.07
s_non_zero_chiral_vol	0.042
s_angle_d	0.018
s_from_restr_planes	0.005
s_anti_bump_dis_restr	0.005
s_bond_d	0.003
s_similar_dist
s_zero_chiral_vol
s_rigid_bond_adp_cmpnt
s_approx_iso_adps

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	2024
Solvent Atoms	169
Heterogen Atoms	20

Software

Software
Software Name	Purpose
ADSC	data collection
DENZO	data reduction
EPMR	phasing
SHELXL-97	refinement