7LOI

Model of the HIV-1 gp41 membrane-proximal external region, transmembrane domain and cytoplasmic tail

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N TROSY HSQC	1.2 mM [U-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
2	3D TROSY HNCO	1.2 mM [U-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
3	3D TROSY HNCA	1.2 mM [U-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
4	2D 1H-15N TROSY HSQC	1 mM [ILV-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
5	2D 1H-13C HSQC	1 mM [ILV-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
8	3D 15N-edited NOESY-TROSY-HSQC	1 mM [ILV-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
7	3D 13C-edited NOESY	1 mM [ILV-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900
6	3D 15N-edited TROSY-NOESY-TROSY-HSQC	1 mM [ILV-100% 13C; U-100% 15N; U-85% 2H] HIV-1 gp41 MPER-TMD-CT, 40 mM DMPC, 80 mM DHPC, 40 mM MES, 1 % sodium azide	90% H2O/10% D2O	0 M	6.7	1 atm	308	Bruker AVANCE III 900

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

NMR Refinement
Method	Details	Software
simulated annealing		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	150
Conformers Submitted Total Number	15
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin		Bruker Biospin
2	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
3	peak picking	CARA		Keller and Wuthrich
4	peak picking	XEASY		Bartels et al.
5	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
6	structure calculation	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore

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.