Table 2.
Simulation details and results.
Simulation Type | POPC:chol:Peptide | Peptide | Analysis Time (ns) | Peptide Height (Å) | Number of Salt Bridges per peptide | |
---|---|---|---|---|---|---|
Lys-Phos | Glu-Choline | |||||
Set 1 surface-bound | 90:10:2 | Neu | 400 | 2.2 ± 0.1 | 3.9 (73) | 1.3 (13) |
Hyd | 400 | 0.7 ± 0.1 | 2.7 (57) | 1.6 (15) | ||
Pos | 400 | 3.3 ± 0.1 | 5.0 (73) | 0.9 (13) | ||
Neg | 400 | 6.4 ± 0.3 | 3.4 (78) | 2.7 (15) | ||
Set 2 edge-bound low density | 80:8:8 | Neu | 400 | NA | 1.0 (40) | 0.3 (6) |
Hyd | 400 | NA | 0.7 (24) | 0.3 (6) | ||
Pos | 400 | NA | 1.9 (35) | 0.3 (6) | ||
Neg | 400 | NA | 1.3 (37) | 0.6 (6) | ||
Set 3 edge-bound high density | 60:6:8 | Neu | 470 | NA | 0.5 (92) | 0.2 (9) |
Hyd | 470 | NA | 0.1 (41) | 0.2 (7) | ||
Pos | 470 | NA | 1.2 (50) | 0.3 (11) | ||
Neg | 470 | NA | 0.9 (130) | 0.5 (10) | ||
Set 4 nanodisc | 150:15:24 | Neu | 500 ns | NA | 0.7 | 0.2 |
Peptide height is defined as the vertical distance between peptides and C2 atoms of oleoyl acyl chains, and is not applicable (NA) to edge-bound simulations. Salt bridges were measured as the number of contacts between nitrogen of amino group of Lys and phosphorus of phosphate group of POPC, and carbon of carboxyl group of Glu and nitrogen of choline group of POPC, averaged over all simulation frames and divided by the number of peptides. Average lifetimes (in ps) are presented in parentheses. Lifetimes for Set 4 are not presented because the trajectory was saved every 240 ps, which is more than typical lifetimes