Table 3. Epitope mapping of MAbs to a panel of site mutations and truncations of SFTSV N protein tested by IFA assay.
Antibodies | WT N | ΔN5 | ΔN10 | ΔC5 | S9Aa | E10Aa | E10A F11Aa | F11Aa | I39Ab | K40Ab | K41Ab | E44Ab | T45Ab | N139Ac | Y140Ac | M141Ac | Y242Ad | R243Ad | N244Ad |
R. Poly | +++ | +++ | + | + | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | ++ | +++ | +++ | +++ | +++ |
H2A12e | +++ | +++ | – | – | +++ | + | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H2A4e | +++ | +++ | – | – | +++ | – | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H2E4e | +++ | +++ | – | – | +++ | + | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H2F4e | +++ | +++ | – | – | +++ | – | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H4B9e | +++ | +++ | – | – | +++ | ++ | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H4C8e | +++ | +++ | – | – | +++ | – | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H4E11e | +++ | +++ | – | – | +++ | + | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
H2H9 | ++ | ++ | – | – | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ | + | ++ | ++ | ++ | ++ |
H1C2 | +++ | +++ | – | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
M7E11e | +++ | +++ | – | – | +++ | + | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | + | +++ | +++ | +++ | +++ |
M1D8 | +++ | +++ | – | – | +++ | +++ | +++ | +++ | +++ | – | – | – | +++ | +++ | + | +++ | +++ | +++ | +++ |
M3E11 | +++ | +++ | – | – | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | +++ | ++ | +++ | +++ | – | +++ |
Single alanine substitution at amino acid positions a5∼15 of N-terminal; bpositions 35∼45; cpositions 132∼142, dpositions 235∼245 of C-terminal. eRefer to major MAbs representing abolished or significantly reduced binding activity to mutation of E10A in N protein; (+) to (+++) indicates the relative intensity of fluorescence. R. Poly: a rabbit polyclonal antibody immunized with the SFTSV recombinant N protein.