Experiment: 2M7W

Independently verified structure of gp41-M-MAT, a membrane associated MPER trimer from HIV-1 gp41

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	2 mM protein, 50 mM sodium phosphate, 100 mM [U-99% 2H] DPC	90% H2O/10% D2O		6.0	ambient	303
2	3D HNCA	2 mM protein, 50 mM sodium phosphate, 100 mM [U-99% 2H] DPC	90% H2O/10% D2O		6.0	ambient	303
3	3D HNCACB	2 mM protein, 50 mM sodium phosphate, 100 mM [U-99% 2H] DPC	90% H2O/10% D2O		6.0	ambient	303
4	3D HN(CO)CA	2 mM protein, 50 mM sodium phosphate, 100 mM [U-99% 2H] DPC	90% H2O/10% D2O		6.0	ambient	303
5	3D 1H-15N NOESY	2 mM protein, 50 mM sodium phosphate, 100 mM [U-99% 2H] DPC	90% H2O/10% D2O		6.0	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	950
2	Varian	INOVA	800
3	Varian	INOVA	600

NMR Refinement
Method	Details	Software
complete search, simulated annealing	DISCO USED TO COMPUTE MPER QUATERNARY STRUCTURE, XPLOR-NIH USED TO COMPUTE MPER SUBUNIT STRUCTURE AND LINKER/FOLDON TRIMER STRUCTURES AND ALSO FOR FULL-LENGTH REFINEMENT.	DISCO

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	200
Conformers Submitted Total Number	18
Representative Model	1 (fewest violations)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	DISCO	1	Martin, Yan, Bailey-Kellogg, Zhou, and Donald
2	structure solution	X-PLOR NIH	2.33	Schwieters, Kuszewski, Tjandra and Clore
3	refinement	X-PLOR NIH	2.33	Schwieters, Kuszewski, Tjandra and Clore