2K21

NMR structure of human KCNE1 in LMPG micelles at pH 6.0 and 40 degree C

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D TROSY-1H-15N HSQC	0.5-1 mM [U-100% 15N] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
2	3D TROSY-HNCO	1 mM [U-13C; U-15N; U-2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
3	3D TROSY-HNCA	1 mM [U-13C; U-15N; U-2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
4	3D TROSY-HN(CO)CA	1 mM [U-13C; U-15N; U-2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
5	3D TROSY-CBCA(CO)NH	1 mM [U-13C; U-15N; U-2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
6	3D TROSY-HNCACB	1 mM [U-13C; U-15N; U-2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
7	3D 1H-15N TROSY-NOESY	1 mM [U-100% 13C; U-100% 15N; 70% 2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313
8	2D TROSY-1H-15N HSQC	1 mM [U-15N; U-2H] KCNE1 (MinK), 10 % D2O, 2 mM EDTA, 2 mM DTT, 250 mM imidazole, 4 % LMPG	90% H2O/10% D2O	0.25	6.0	ambient	313

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Bruker	AVANCE	800
3	Varian	INOVA	900

NMR Refinement
Method	Details	Software
DGSA-distance geometry simulated annealing	The refinement protocol consisted of slow cooling from 1000 K to 100 K spanning 45 ps. Final structures were energy-minimized using 250 steps of Powell energy minimization. The 20 structures with lowest energy were subjected to further analysis and spin-labeled Cys residues associated with PRE restraints were changed back to their wild type residues. Powell energy minimization was then performed.	TopSpin

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	500
Conformers Submitted Total Number	10
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	The structure was determined using combination of NOEs, PREs, and RDCs.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	1.3	Bruker Biospin
2	processing	NMRPipe	v2.4	Delaglio, F. et al.
3	data analysis	NMRView	5.2.2_01	Johnson, B.A. et al.
4	data analysis	CYANA	2.1	Guntert, P. et al.
5	refinement	X-PLOR NIH	2.17	Schwieters, C.D. et al.
6	data analysis	ProcheckNMR	v.3.5.4	Laskowski, R.A. et al.