Experiment: 1IDG

THE NMR SOLUTION STRUCTURE OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND AN 18MER COGNATE PEPTIDE

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_TOCSY	2.1 mM alpha-Bungarotoxin/alpha18mer complex, alpha18mer is 15N labeled, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide	95% H2O/5% D2O		4.0	ambient	308
2	3D HNHA	2.1 mM alpha-Bungarotoxin/alpha18mer complex, alpha18mer is 15N labeled, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide	95% H2O/5% D2O		4.0	ambient	308
3	3D_15N-separated_NOESY	2.1 mM alpha-Bungarotoxin/alpha18mer complex, alpha18mer is 15N labeled, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide	95% H2O/5% D2O		4.0	ambient	308
4	2D_TOCSY	2.1 mM alpha-Bungarotoxin/alpha18mer complex, alpha18mer is 15N labeled, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide	95% H2O/5% D2O		4.0	ambient	308
5	2D_NOESY	2.1 mM alpha-Bungarotoxin/alpha18mer complex, alpha18mer is 15N labeled, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide	95% H2O/5% D2O		4.0	ambient	308
6	2D 1H-15N HSQC	2.1 mM alpha-Bungarotoxin/alpha18mer complex, alpha18mer is 15N labeled, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide	95% H2O/5% D2O		4.0	ambient	308

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
distance geometry and simulated annealing		XwinNMR

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number	1
Conformers Submitted Total Number	1
Representative Model	(minimized average structure)

Additional NMR Experimental Information
Details	The chirality error is in THR 6 CB, OG1; ILE 11 CB, CG2; and THR 196 CB, OG1. There is no chirality error if MOLMOL is used to view the structure.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.1	Bruker
2	processing	NMRPipe	1.8	Delaglio, F. et al.
3	data analysis	Sparky	3.95	Goddard, T.D. and Kneller, D.G.
4	refinement	CNSsolve	1.0	Brunger, A.T. et al.