CONFORMATIONAL MAPPING OF THE N-TERMINAL SEGMENT OF SURFACTANT PROTEIN B IN LIPID USING 13C-ENHANCED FOURIER TRANSFORM INFRARED SPECTROSCOPY (FTIR)
INFRARED SPECTROSCOPY
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 13-C isotope enhanced FTIR | This structure was determined using 13-C isotope enhanced FTIR spectroscopy on a family of selectively labeled chemically synthesized peptides. 13-C carbonyl labels included residues 1,3,5,8,10,11,13,14,15,16,18,25. | Liposomes of 1-palmitoyl-2-oleoyl phosphatidylglycerol (POPG) | 10 mM phosphate | 7.4 | 1 atm | 298 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Mattson FTIR | Research Series | |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| molecular dynamics, simulated annealing | Molecular dynamics (simulated annealing) was used to generate an ensemble of conformers consistent with the FTIR data. | Winfirst |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with acceptable covalent geometry |
| Conformers Calculated Total Number | 15 |
| Conformers Submitted Total Number | 10 |
| Representative Model | 8 (closest to the average) |
| Additional NMR Experimental Information | |
|---|---|
| Details | 13-C isotope enhanced FTIR study. The coordinates in this entry were generated from 13-C induced spectral shifts which give residue-specific secondary structure information. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | data analysis | Winfirst | (FTIR curve fitting software) | Kauppine et al. |
| 2 | refinement | Discover | 2.9.7 | Molecular Simulations, Inc. (San Diego, CA) |
