Discovery of novel antimicrobial peptides with unusual cysteine motifs in dandelion Taraxacum officinale Wigg. flowers

► Three novel antimicrobial peptides were isolated from Taraxacum officinale flowers. ► Primary structures of these peptides were determined and it was shown that their molecules belong to new types of cystein-rich plant peptides. ► The peptides of current structure types were discovered only in dandelion flowers. ► The peptides were shown to display high antimicrobial activity both against fungal and bacterial pathogens in laboratory conditions.