1LUP

Solution structure of a toxin (GsMTx2) 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 GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	278
2	2D NOESY	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	289
3	2D NOESY	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	293
4	2D NOESY	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	298
5	2D NOESY	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	308
6	DQF-COSY	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	298
7	2D-Tocsy	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	308
8	1H 15N-HSQC	2 mM natural abundance GsMTx2	10% D2O, pH 4.5	1 mM NaCl	4.5	ambient	298
9	2D NOESY	2 mM natural abundance GsMTx2	100% D2O, pH 4.5	1 mM NaCl	4.5	ambient	278
10	2D NOESY	2 mM natural abundance GsMTx2	100% D2O, pH 4.5	1 mM NaCl	4.5	ambient	289
11	2D NOESY	2 mM natural abundance GsMTx2	100% D2O, pH 4.5	1 mM NaCl	4.5	ambient	293
12	2D NOESY	2 mM natural abundance GsMTx2	100% D2O, pH 4.5	1 mM NaCl	4.5	ambient	298
13	E-cosy	2 mM natural abundance GsMTx2	100% D2O, pH 4.5	1 mM NaCl	4.5	ambient	298
14	1H 13C-HSQC	2 mM natural abundance GsMTx2	100% D2O, pH 4.5	1 mM NaCl	4.5	ambient	298

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		Felix

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	processing	Felix	2.2	Accelrys, Inc.
2	processing	NMRPipe	2.1	Delaglio
3	data analysis	Sparky	3.95	Goddard
4	refinement	CNS	1.1	Brunger

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.