6MIE

Solution NMR structure of the KCNQ1 voltage-sensing domain

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D HNCA	0.4 mM [U-100% 13C; U-100% 15N; U-80% 2H] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
2	3D HNCO	0.4 mM [U-100% 13C; U-100% 15N; U-80% 2H] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
3	3D HN(CO)CA	0.4 mM [U-100% 13C; U-100% 15N; U-80% 2H] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
4	3D 1H-15N NOESY	0.4 mM [U-100% 13C; U-100% 15N; U-80% 2H] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
5	3D HNCACB	0.4 mM [U-100% 13C; U-100% 15N; U-80% 2H] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
6	2D 1H-15N HSQC	0.4 mM [U-100% 13C; U-100% 15N; U-80% 2H] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
7	2D 1H-15N HSQC	0.4 mM [U-100% 13C; U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 600
8	3D H(CCO)NH	0.4 mM [U-100% 13C; U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 600
9	3D C(CO)NH	0.4 mM [U-100% 13C; U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 600
10	3D HCCH-COSY	0.4 mM [U-100% 13C; U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 600
11	2D 1H-13C HSQC aliphatic	0.4 mM [U-100% 13C; U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v Deuterated LMPG	100% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
12	3D 1H-13C NOESY	0.4 mM [U-100% 13C; U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v Deuterated LMPG	100% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
13	2D 1H-15N HSQC	0.4 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
14	3D 1H-15N NOESY	0.4 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
15	2D IPAP-HSQC	0.4 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
16	2D IPAP-HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 mM LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
17	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 mM LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
18	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
19	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
20	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
21	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
22	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
23	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900
24	2D 1H-15N HSQC	0.2 mM [U-100% 15N] KCNQ1-VSD, 50 mM MES, 0.5 mM EDTA, 2 mM TCEP, 4 % w/v LMPG	95% H2O/5% D2O	4 % (w/v) LMPG	5.5	1 atm	323	Bruker AVANCE III 900

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE III	600
2	Bruker	AVANCE III	900

NMR Refinement
Method	Details	Software
molecular dynamics	10 structures were solvated in an explicit hydrated DMPC bilayer and 100 ns of restrained molecular dynamics (rMD) were performed. Each trajectory was then extended another 190 ns with NMR restraints turned off. The last 100 ns of the trajectory seeded with the lowest energy rMD structure was divided into ten 10 ns blocks. The centroid of the most populated cluster for each 10 ns time block corresponds to models 1 through 10 in the ensemble. Model number 1 has the lowest RMSD to the average coordinates. Each model in the ensemble was scored with the NMR restraints and found to be largely consistent with the experimental data. It is important to note that the precision of the ensemble no longer is reflective of the precision of the XplorNIH simulated annealing step. Please see published methods for further details.	Amber

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	150
Conformers Submitted Total Number	10
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Amber	16	Case, Darden, Cheatham III, Simmerling, Wang, Duke, Luo, ... and Kollman
2	structure calculation	XPLOR-NIH	2.48	C.D. Schwieters, J.J. Kuszewski, N. Tjandra and G.M. Clore
3	chemical shift assignment	Sparky	NMRFAM	Goddard
4	peak picking	Sparky	NMRFAM	Goddard
5	collection	TopSpin	3.2	Bruker Biospin
6	processing	TopSpin	3.2	Bruker Biospin