Table 1.
Comparison of cold-induced thermoring structural changes of rTRPV2 along the PE-dependent minimal gating pathway from F330 to L719. The comparative parameters are highlighted in bold.
| PDB ID | 6BO5 | 6BO4 | 5HI9 | 8EKR |
|---|---|---|---|---|
| Construct | Δ(564–589) | rTRPV2 | ||
| Lipid in the VSLD | free | bound | ||
| Lipid at the active vanilloid site | free | |||
| Lipid environment | MNG | DMNG | DMNG/MSP2N2 | |
| Sampling temperature, °C | 4 | |||
| Gating state | Partially open/inact | Open | Closed state 4 | Closed state 3 |
| # of the biggest Grid s | Grid14 | Grid12’ | Grid19 | Grid12 |
| grid size (s) | 14 | 12 | 19 | 12 |
| The weakest noncovalent links in Grid s | F540-L641 F547-Y629 |
H370-I659 I524-W660 |
H438-R490 | R369-E469 |
| # of basic H-bonds (n) energetically equivalent to the least-stable noncovalent bridge | 2.0/3.0 | 2.6 | 2.0 | 2.0 |
| Total non-covalent interactions (N) | 30 | 35 | 44 | 67 |
| Total grid sizes (S), a.a | 83 | 71 | 88 | 99 |
| Systemic thermal instability (T i ) | 2.77 | 2.03 | 2.00 | 1.48 |
| Calculated Tm °C at E = 1 kcal/mol | 46/56 | 56 | 36 | 50 |
| Measured threshold T th , °C | 46/56 | 56 | 35 | 48–52 |
| Calculated Ω10, mean at E = 1.0 kcal/mol | 4.64 | 154.6 | 3.85 | 154.6 |
| Measured Q 10 | 3.88 | 154.7 | 3.88 | 154.7 |
| Refs for Tth and Q10 | (17) | (17) | (17) | (17) |