1G1N

NICKED DECAMER DNA WITH PEG6 TETHER, NMR, 30 STRUCTURES

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1.5 mM DNA; Phosphate buffer (38 mM NaCl, 38 mM K3PO4)	90% H2O/10% D2O	152 mM of monovalent cations	7.0	ambient	283
2	2D NOESY	1.5 mM DNA; Phosphate buffer (38 mM NaCl, 38 mM K3PO4)	100% D2O	152 mM of monovalent cations	7.0	ambient	300
3	E-COSY	1.5 mM DNA; Phosphate buffer (38 mM NaCl, 38 mM K3PO4)	100% D2O	152 mM of monovalent cations	7.0	ambient	300
4	HSQC	1.5 mM DNA; Phosphate buffer (38 mM NaCl, 38 mM K3PO4)	100% D2O	152 mM of monovalent cations	7.0	ambient	300

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	500

NMR Refinement
Method	Details	Software
Simulated Annealing, Restrained Molecular Dynamics, Iterative Relaxation Matrix Analysis	The structures are based on a total of 514 restraints, 285 are NOE-derived distance constraints, 175 dihedral angle restraints, 54 distance restraints from hydrogen bonds. The NOE-derived distance constraints were derived from 2D-NOESY spectra (mix. times 50, 75, 100 and 150 ms), using the Iterative Relaxation Matrix Analysis procedure. The final structures were derived by averaging coordinates of 100 structures obtained from IRMA cycles and subsequent 350 ps trajectory of restrained molecular dynamics and energy minimisation. R factor value: 0.41 +/- 0.01; R(1/6) value: 0.0045 +/- 0.0001; RMSD value: 1.22 +/- 0.51; The R and R(1/6) - factors are defined: R = SUM{|I(OBS) - I(CALC)|} / SUM{|I(OBS)|} R(1/6)=SQR(SUM{|I(OBS)^(1/6) - I(CALC)^(1/6)|}^2) / SUM{I(OBS)^(1/6)} Where I(OBS) and I(CALC) are the observed and the calculated NOE intensites.	Discover

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	350
Conformers Submitted Total Number	30
Representative Model	6 (n/a)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear and heteronuclear techniques

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Discover	98.0	MSI INSIGHT II package
2	iterative matrix relaxation	IRMA	98.0	MSI INSIGHT II package
3	processing	Felix	98.0	MSI INSIGHT II package
4	processing	VNMR	6.1B	Varian