7YFS

The NMR structure of noursin, a tricyclic ribosomal peptide containing a histidine-to-butyrine crosslink

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H COSY	5.0 mM noursin	CD3OH	0	7.0	1 atm	298	Bruker AVANCE III 600
2	2D 1H-13C HSQC	5.0 mM noursin	CD3OH	0	7.0	1 atm	298	Bruker AVANCE III 600
3	2D 1H-15N HSQC	5.0 mM noursin	CD3OH	0	7.0	1 atm	298	Bruker AVANCE III 600
4	2D 1H-1H NOESY	5.0 mM noursin	CD3OH	0	7.0	1 atm	298	Bruker AVANCE III 600
5	2D 1H-1H TOCSY	5.0 mM noursin	CD3OH	0	7.0	1 atm	298	Bruker AVANCE III 600
6	2D 1H-13C HMBC	5.0 mM noursin	CD3OH	0	7.0	1 atm	298	Bruker AVANCE III 600

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

NMR Refinement
Method	Details	Software
molecular dynamics		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	4.0.9	Bruker Biospin
3	processing	TopSpin		Bruker Biospin
2	chemical shift assignment	NMRFAM-SPARKY	1.470	Lee W, Tonelli M, Markley JL
4	structure calculation	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
5	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.