1MXP

Solution structure of the ribbon disulfide bond isomer of alpha-conotoxin AuIB

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM ribbon AuIB peptide	90% H2O/10% D2O		3.5	atmospheric atm	280
2	2D TOCSY	2mM ribbon AuIB peptide	90% H2O/10% D2O		3.5	atmospheric atm	280
3	DQF-COSY	2mM ribbon AuIB peptide	90% H2O/10% D2O		3.5	atmospheric atm	280
4	E-COSY	2mM ribbon AuIB peptide	100% D2O		3.5	atmospheric atm	280
5	2D NOESY	2mM ribbon AuIB peptide	100% D2O		3.5	atmospheric atm	280
6	2D TOCSY	2mM ribbon AuIB peptide	100% D2O		3.5	atmospheric atm	280

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	750
2	Bruker	ARX	500

NMR Refinement
Method	Details	Software
simulated annealing, molecular dynamics, energy minimisation in a CHARM force field	140 noe restraints were used including 4 long and 13 medium range noes, also 3 dihedral angles were included	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	20
Representative Model	7 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.6	Bruker
2	processing	XwinNMR	2.6	Bruker
3	refinement	X-PLOR	3.851 then 3.1f	Brunger
4	structure solution	X-PLOR	3.851 then 3.1f	Brunger