Table 1. Simulation parameters of room temperature EPR spectra.
− NarG(1–15) peptide | + NarG(1–15) peptide | ||||||
Sample | Component | τ (ns) | Ω | % | τ (ns) | Ω | % |
H21C | 1 | 6.0±0.6 | 0.97±0.05 | 89 | 4.7±0.6 | 0.95±0.05 | 96 |
2 | 0.4±0.1 | 0.97±0.05 | 11 | 0.10±0.05 | 1.00±0.05 | 4 | |
Q104C | 1 | 2.8±0.3 | 0.75±0.05 | 79 | 4.4±0.5 | 0.80±0.05 | 79 |
2 | 0.24±0.05 | 0.96±0.05 | 21 | 0.26±0.05 | 0.94±0.05 | 21 | |
E119C | 1 | 0.9±0.2 | 0.40±0.05 | 53 | 0.8±0.2 | 0.23±0.05 | 89 |
2 | 3.5±0.4 | 0.64±0.05 | 47 | 3.5±0.4 | 0.64±0.05 | 11 | |
Q149C | 1 | 0.9±0.2 | 0.85±0.05 | 53 | 0.8±0.2 | 0.86±0.05 | 52 |
2 | 1.3±0.2 | 0.70±0.05 | 47 | 1.3±0.2 | 0.68±0.05 | 48 |
Parameters (effective rotational correlation time τ, free conformational space Ω and proportion in %) extracted from the simulation of the RT EPR spectra of the labeled NarJT at positions 21, 104, 119 and 149 either in the absence or in the presence of a molar excess of 10 of NarG(1–15). Simulations were performed using the EPRSIM-C software [44].