1TYK

SOLUTION STRUCTURE OF A TOXIN FROM THE TARANTULA, GRAMMOSTOLA SPATULATA, WHICH INHIBITS MECHANOSENSITIVE ION CHANNELS

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2 MM NATURAL ABUNDANCE GSMTX4	H2O	1 mM NACL	4.5	AMBIENT	278
2	DQF-COSY	2 MM NATURAL ABUNDANCE GSMTX4	H2O	1 mM NACL	4.5	AMBIENT	278
3	E-COSY	2 MM NATURAL ABUNDANCE GSMTX4	H2O	1 mM NACL	4.5	AMBIENT	278
4	2D TOCSY	2 MM NATURAL ABUNDANCE GSMTX4	H2O	1 mM NACL	4.5	AMBIENT	278
5	1H-13C-HSQC	2 MM NATURAL ABUNDANCE GSMTX4	H2O	1 mM NACL	4.5	AMBIENT	278
6	1H-15N-HSQC	2 MM NATURAL ABUNDANCE GSMTX4	H2O	1 mM NACL	4.5	AMBIENT	278

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600
2	Varian	INOVA	500

NMR Refinement
Method	Details	Software
DISTANCE GEOMETRY, SIMULATED ANNEALING, RAMACHANDRAN REFINEMENT		X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS, STRUCTURES WITH THE LOWEST ENERGY
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	H-D EXCHANGE USING 2D TOCSY FOLLOWING RESUSPENSION OF LYOPHILIZED PROTEIN IN 100% D2O

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	BRUNGER
2	structure solution	Felix	2.2
3	structure solution	NMRPipe	2.1	Delaglio
4	structure solution	Sparky	3.95	Goddard
5	structure solution	CNS	2.1	BRUNGER

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.