7A0I

NMR structure of flagelliform spidroin (FlagSp) N-terminal domain from Trichonephila clavipes at pH 7.2

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D 1H-15N NOESY	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600
2	3D 1H-13C NOESY aliphatic	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600
3	3D 1H-13C NOESY aromatic	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600
4	3D CBCA(CO)NH	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600
5	3D HNCA	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600
6	3D HNCO	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600
7	3D HNHA	1.2 mM [U-13C; U-15N] Flagelliform spidroin N-terminal domain, 20 mM sodium phosphate, 300 mM sodium chloride, 0.03 % sodium azide, 10 % [U-2H] D2O	90% H2O/10% D2O	0.35 M	7.2	AMBIENT atm	298	Bruker AVANCE 600

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

NMR Refinement
Method	Details	Software
torsion angle dynamics		CYANA
simulated annealing		CNS

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure calculation	CYANA	2.1	Guntert, Mumenthaler and Wuthrich
2	refinement	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
3	chemical shift assignment	CARA		Keller and Wuthrich
4	collection	TopSpin	4.0	Bruker Biospin
6	peak picking	CANDID		Herrmann, Guntert and Wuthrich
5	processing	TopSpin		Bruker Biospin

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 R01GM133198.