Table 5.
Amino acid substitutions of the NA protein in Hulunbuir (H1N1) pdm09 strains compared with that in A/Michigan/45/2015, the WHO-recommended vaccine strain during 2017–2019
| Year | Strains | %AA identity | NA | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 41 | 47 | 51 | 74 | 77 | 81 | 127 | 163 | 188 | 248 | 314 | 389 | 416 | 438 | 449 | 452 | 453 | 467 | |||
| A/Michigan/45/2015(H1N1) | 100.00 | C | G | E | Q | F | G | V | L | I | I | D | M | I | D | T | N | T | V | I | |
| 2017 | A/Hulunbuir/1701/2017(H1N1) | 99.57 | – | – | G | – | – | – | – | – | – | T | – | – | – | – | – | – | – | – | – |
| 2017 | A/Hulunbuir/1702/2017(H1N1) | 99.79 | – | D | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 2017 | A/Hulunbuir/1703/2017(H1N1) | 99.79 | – | D | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 2018 | A/Hulunbuir/1801/2017(H1N1) | 97.23 | – | – | – | – | – | R | A | – | V | T | N | – | – | – | – | D | – | G | – |
| 2018 | A/Hulunbuir/1802/2017(H1N1) | 98.72 | – | – | – | – | – | R | A | – | V | T | N | – | – | – | – | D | – | – | – |
| 2018 | A/Hulunbuir/1803/2017(H1N1) | 98.93 | – | – | – | – | – | R | A | – | – | T | – | – | – | – | A | D | – | – | – |
| 2019 | A/Hulunbuir/1901/2017(H1N1) | 98.08 | – | – | – | K | S | R | A | – | – | T | – | – | K | N | – | D | I | – | – |
| 2019 | A/Hulunbuir/1902/2017(H1N1) | 98.08 | – | – | – | K | S | R | A | – | – | T | – | – | K | N | – | D | I | – | – |
| 2019 | A/Hulunbuir/1903/2017(H1N1) | 98.51 | S | – | – | – | – | R | A | V | – | – | – | I | – | – | – | D | – | – | V |
Notes: 2009 H1N1 pandemic numbering.