Experiment: 1VM2

Solution structure of an anticancer peptide designed based on the N-terminal sequence of E. coli enzyme IIA (Glucose)

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM peptide, 80mM sodium dodecylsulfate, 90% H2O, 10% D2O	90% H2O/10% D2O		5.4	ambient	298
2	TOCSY	2mM peptide, 80mM sodium dodecylsulfate, 90% H2O, 10% D2O	90% H2O/10% D2O		5.4	ambient	298
3	DQF-COSY	2mM peptide, 80mM sodium dodecylsulfate, 90% H2O, 10% D2O	90% H2O/10% D2O		5.4	ambient	298
4	ROESY	2mM peptide, 80mM sodium dodecylsulfate, 90% H2O, 10% D2O	90% H2O/10% D2O		5.4	ambient	298
5	(1H,15N)HSQC	2mM peptide, 80mM sodium dodecylsulfate, 90% H2O, 10% D2O	90% H2O/10% D2O		5.4	ambient	298
6	(1H,13C)HSQC	2mM peptide, 80mM sodium dodecylsulfate, 90% H2O, 10% D2O	90% H2O/10% D2O		5.4	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on 124 distances derived from the NOESY spectra, 20 backbone dihedral angles derived from a set of chemical shifts using the NMR program TALOS, and 4 chi1 angle restraints.	NMRPipe/nmrDraw

NMR Ensemble Information
Conformer Selection Criteria	No NOE violations greater than 0.50 A, rms difference for bond deviations from ideality less than 0.01 A, rms difference for angle deviations from ideality less than 5 degrees, Structures with the lowerest energies in the ensemble
Conformers Calculated Total Number	100
Conformers Submitted Total Number	5
Representative Model	1 (most resemble the average structure)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear NMR techniques, plus the use of backbone angle restraints derived from a set of heteronuclear chemical shifts measured on the natural abundance peptide bound to micelles.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	data processing	NMRPipe/nmrDraw	2.1	Delaglio, F.
2	noe picking	PIPP	1.0	Garrett, D.
3	refinement	XPLOR-NIH	1.06	Schwieters, C.D., Kuszewski, J., Tjandra, N, Clore, G.M.
4	structural analysis and viewing	MOLMOL	2K.1	Koradi, R.