2N1T

Dynamic binding mode of a synaptotagmin-1-SNARE complex in solution

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	30 uM [U-100% 13C; U-100% 15N] protein, 25 mM Tris-HCl, 125 mM KSCN, 1 mM CaCl2	90% H2O/10% D2O		7.4	ambient	298
2	2D 1H-13C HMQC	30 uM [U-100% 13C; U-100% 15N] protein, 25 mM Tris-HCl, 125 mM KSCN, 1 mM CaCl2	90% H2O/10% D2O		7.4	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	800
2	Varian	INOVA	600

NMR Refinement
Method	Details	Software
molecular dynamics	MOLECULAR DYNAMICS SIMULATIONS WERE USED TO GENERATE STRUCTURES OF THE SYNAPTOTAGMIN-1 C2B DOMAIN-SNARE COMPLEX THAT COULD BE EVALUATED BASED ON HOW WELL THEY FIT THE MEASURED PSEUDOCONTACT SHIFTS. SINCE IT WAS CLEAR FROM THE ANALYSIS THAT THE COMPLEX IS HIGHLY DYNAMICS AND NO SINGLE STRUCTURE CAN FIT ALL THE DATA, THE STRUCTURES FROM THE SIMULATIONS WERE USED TO TRY TO FIT THE MEASURED PSEUDOCONTACT SHIFTS AS ENSEMBLED-AVERAGED VALUES. THE STRUCTURES IN THE DEPOSITION ARE AMONG THOSE THAT CONTRIBUTED TO THE BEST ENSEMBLE-AVERAGE FITS.	NAMD

NMR Ensemble Information
Conformer Selection Criteria	Contribution to fit PCS data
Conformers Calculated Total Number	10000
Conformers Submitted Total Number	5
Representative Model	1 (all these conformers contribute to this dynamics ensemble)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	data analysis	NMRView	8.0.a15	Johnson, One Moon Scientific
2	data analysis	Numbat	0.991	Christophe Schmitz and Thomas Huber
3	refinement	NAMD	2.7	Klaus Schulten
4	refinement	GROMACS		van Gunsteren and Berendsen
5	refinement	PLUMED2		Giovanni Bussi
6	refinement	ALMOST		Andrea Cavalli