Porcine interferon-like recombinant protein and use thereof

A porcine interferon-like recombinant protein, selected from one of the following:

• A1) a protein having an amino acid sequence as shown in SEQ ID NO:
• 1;
• A2) a fusion protein obtained by linking a tag to the N-terminal and/or C-terminal of the protein having the amino acid sequence as shown in SEQ ID NO:
• 1;
• A3) a protein with one or more amino acid substitutions, deletions, and/or additions based on the amino acid sequence as shown in SEQ ID NO:
• 1, while retaining the same function;
• A4) a protein having at least 85% sequence homology to the amino acid sequence as shown in SEQ ID NO:
• 1, while maintaining the same function;
• A5) a mutated protein with 1 to 7 amino acid residue mutations compared to amino acid sequences of 17 porcine natural IFN-α subtypes, wherein sites of the mutations are selected from P(V)4A, A42V, H58Y, E71K, G72D, A74S, and A148V of the amino acid sequence as shown in SEQ ID NO:
• 1;
• A6) a modified protein obtained by pharmaceutically acceptable protein modifications of the protein having the amino acid sequence as shown in SEQ ID NO:
• 1.