Table 3.
Wavenumbers, secondary structure contents and dichroïc ratio for Amide I band for SFV21 in supported lipid bilayer at different lipid/peptide ratio Ri obtained by fit of the ATR-IR spectra in the amide I region. Lipid composition: DMPC:DMPG:cholesterol:DMPE (6:2:5:3).
| Secondary structure | Wavenumber (cm− 1) | % (± 1.0) |
RATR (Amide I) (± 0.05) |
|
|---|---|---|---|---|
| Ri = 150 | β-Sheet | 1624–1633–1685 | 28,7 | 1,55 |
| Random | 1642 | 19,7 | – | |
| α-Helix | 1654–1663 | 43,0 | 1,44 | |
| Β-Turn | 1677 | 8,6 | – | |
| Ri = 75 | β-Sheet | 1624–1633–1681 | 31,5 | 1,45 |
| Random | 1643 | 21,2 | – | |
| α-Helix | 1653–1664 | 37,8 | 1,80 | |
| β-Turn | 1673 | 9,5 | – | |
| Ri = 20 | β-Sheet | 1617–1631–1685 | 37,2 | 1,50 |
| Random | 1642 | 20,6 | – | |
| α-Helix | 1653–1664 | 33,1 | 2,05 | |
| β-Turn | 1675 | 9,1 | – |