This invention relates to the field of
antimicrobial peptide technology, and particularly to the
antimicrobial peptide Ple-AB, its preparation method, and its applications. Using the fungal
defensin Plectasin as a template, this invention designs and modifies the
antimicrobial peptide Ple-AB. Compared with
Plectasin, this antimicrobial peptide exhibits significantly higher antimicrobial activity and better bactericidal effects against
Gram-positive
bacteria; it also shows higher stability, particularly excellent resistance to
trypsin; and its
fermentation expression level is significantly improved. Furthermore, this antimicrobial peptide has very low hemolytic activity and
cytotoxicity, making it suitable for development in antimicrobial drugs, additives,
cosmetics, health products, and other fields, with broad application value and market prospects.