TABLE 2.
Precise mapping of the LX1 epitope of the dengue-2 virus NS1 protein with MAbs
| Peptide sequence | ELISA reaction (A492) to MAba:
|
||||
|---|---|---|---|---|---|
| 1A12.3 | 3D1.4 | 4H3.4 | 3A5.4 | 1G5.4-A1-C3 | |
| RPQPTELRY | 0.24 | 0.07 | 0.05 | 0.04 | 1.15 |
| QPTELRYSW | 0.30 | 0.08 | 0.07 | 0.05 | 1.04 |
| TELRYSWKT | 0.42 | 0.13 | 0.12 | 0.13 | 1.24 |
| LRYSWKTWG | 0.19 | 1.42 | 1.37 | 1.70 | 0.74 |
| YSWKTWGKA | 1.73 | 1.75 | 0.82 | 1.29 | 0.42 |
| WKTWGKAKM | 0.79 | 0.87 | 0.08 | 0.20 | 0.16 |
| TWGKAKMLS | 0.03 | 0.09 | 0.05 | 0.01 | 0.05 |
| GKAKMLSTE | 0.02 | 0.06 | 0.04 | 0.01 | 0.04 |
| AKMLSTELH | 0.09 | 0.07 | 0.04 | 0.03 | 0.25 |
| YSWKTWGK | 0.14 | 1.09 | 0.70 | 0.80 | 0.19 |
| YSWKTWG | 0.21 | 2.49 | 2.10 | 1.83 | 0.16 |
| YSWKTW | 0.15 | 1.92 | 0.54 | 1.22 | 0.18 |
| YSWKT | 0.09 | 0.12 | 0.09 | 0.08 | 0.14 |
| SWKTWGKA | 0.47 | 1.19 | 0.98 | 1.05 | 0.20 |
| WKTWGKA | 0.87 | 0.97 | 0.36 | 0.58 | 0.18 |
| KTWGKA | 0.46 | 0.08 | 0.09 | 0.08 | 0.17 |
| TWGKA | 0.11 | 0.12 | 0.10 | 0.09 | 0.09 |
MAbs, which defined either the LX1 epitope (MAbs 1A12.3, 3D1.4, 4H3.4, and 3A5.4) or multiple ELK/KLE-type motifs (MAb 1G5.4-A1-C3), were diluted to 1/250 to 1/500 and reacted with overlapping synthetic peptides sequentially spanning amino acids 105 to 129 of the D-2V (strains PR159S1 and TR1751) NS1 protein and a set of peptides in which the LX1 epitope (113YSWKTWGKA121) was sequentially truncated. A492 values of >1.00 for each MAb are underlined, and the peak reactions against each overlapping and truncated synthetic peptide set are shown in boldface.