2AXB

Crystal Structure Analysis Of A 2-O-[2-(methoxy)ethyl]-2-thiothymidine Modified Oligodeoxynucleotide Duplex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		287	Mini Screen, VAPOR DIFFUSION, HANGING DROP, temperature 287K

Crystal Properties
Matthews coefficient	Solvent content
1.96	37.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 25.251	α = 90
b = 45.002	β = 90
c = 44.971	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	103				2003-03-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 5ID-B	.9873	APS	5ID-B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.61	12.9					6642

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.61	12.9	6627	6304	338	95.13	0.19589	0.19589	0.19559	0.2017	RANDOM	8.976

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]
0.07			0.01		-0.08

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	17.014
r_sphericity_bonded	4.893
r_scangle_it	4.235
r_scbond_it	3.703
r_rigid_bond_restr	2.856
r_angle_refined_deg	2.534
r_angle_other_deg	1.629
r_nbd_other	0.373
r_symmetry_hbond_refined	0.343
r_nbd_refined	0.331
r_xyhbond_nbd_refined	0.321
r_nbtor_other	0.2
r_symmetry_vdw_other	0.195
r_chiral_restr	0.13
r_symmetry_vdw_refined	0.091
r_bond_refined_d	0.012
r_gen_planes_other	0.011
r_gen_planes_refined	0.009
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	414
Solvent Atoms	154
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345	data collection
XDS	data scaling
AMoRE	phasing