Table 1. HLA-A2-binding capability of the predicted EGFR T790M-derived peptides.
Peptide name | Amino acid sequence | NetMHC 3.2 ANN IC50 (nM) | BIMAS score | HLA-binding capability (%)a |
T790M-1 | VQLIMQLMPF | 3705 | 0.109 | 0 |
T790M-2 | QLIMQLMPFG | 4054 | 0.943 | 0 |
T790M-3 | LIMQLMPFGC | 837 | 24.921 | 0 |
T790M-4 | IMQLMPFGCL | 925 | 6.478 | 0 |
T790M-5 | MQLMPFGCLL | 977 | 51.770 | 207.5 |
T790M-6 | LTSTVQLIMQL | 4187 | NAc | 0 |
T790M-7 | LIMQLMPFGCL | 530 | NA | 19.1 |
T790M-8 | IMQLMPFGCLL | 118 | NA | 57.0 |
WT-5b | TQLMPFGCLL | 2578 | 30.453 | 158.2 |
WT-7b | LITQLMPFGCL | 5063 | NA | 0 |
Flu-M1 | GILGFVFTL | 18 | 550.927 | 234.4 |
HLA-A2-binding capability was estimated by the increase in mean fluorescence intensity (MFI) as determined by flow cytometry after staining of RMA-S/A2 cells with anti-HLA-A2 mAb, as follows: MFI increase (%) = (MFI with a given peptide – MFI without peptides)/(MFI without peptides) X 100. The experiments were repeated three times and a representative result is shown.
WT-5 and WT-7 peptides have wild-type sequences, corresponding to the T790M-5 and T790M-7 peptides, respectively.
NA, not available.