1MB6

Three dimensional solution structure of huwentoxin-IV by 2D 1H-NMR

SOLUTION NMR

---

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	NOESY	5MM HUWENTOXIN-IV MMOL/L PHOSPHATE BUFFER; 90%H2O, 10%D2O	90% H2O/10% D2O	20	4.50	1 atm	300.00
2	DQF-COSY	5MM HUWENTOXIN-IV MMOL/L PHOSPHATE BUFFER; 90%H2O, 10%D2O	90% H2O/10% D2O	20	4.50	1 atm	300.00
3	TOCSY	5MM HUWENTOXIN-IV MMOL/L PHOSPHATE BUFFER; 90%H2O, 10%D2O	90% H2O/10% D2O	20	4.50	1 atm	300.00
4	E-COSY	5MM HUWENTOXIN-IV MMOL/L PHOSPHATE BUFFER; 90%H2O, 10%D2O	90% H2O/10% D2O	20	4.50	1 atm	300.00

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	500

NMR Refinement
Method	Details	Software
simulated annealing	THE STRUCTURES ARE BASED ON 527 NOE-DERIVED DISTANCE CONSTRAINTS, 14 DIHEDRAL ANGEL RESTRAINTS AND 9 FAKE DISTANCE RESTRAINTS FROM DISULFIDE BONDS.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	THIS STRUCTURE WAS DETERMINED USING STANDARD 2D HOMONUCLEAR TECHNIQUES.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	BRUNGER
2	structure solution	FELIX	98.0	MSI.Corp.