The invention discloses a human alpha-
defensin-5 modifier and applications thereof, and belongs to the technical field of
biology. The modifier is obtained in the mode that
amino acid residues are added at the C
tail end of human alpha-
defensin-5, and
fatty acid is modified and connected to the
amino acid residues for modifying; at least one
amino acid residue has a
free amino group in the added amino acid residues, and the
fatty acid with 8-24 carbon atoms is modified and connected on the
free amino group. The invention further discloses the applications of the human alpha-
defensin-5 modifier to preparing antibacterial
medicine and immune adjustment
medicine. According to the human alpha-defensin-5 modifier and the applications thereof, the C
tail end of the HD-5 extends and is modified, and the
antibacterial activity is remarkably enhanced; particularly, Lys extending at the C
tail end of the HD-5 is subjected to
myristic acid modification, the
salt resistance of the modifier can be obviously improved, the limitation of the sensibility of traditional
antibacterial peptide salt is broken through, and the human alpha-defensin-5 modifier has important clinical application prospects; macrophage can be remarkably allowed to release
inflammatory factors through the modifier, and the human alpha-defensin-5 modifier can be applied to preparing of the immune adjustment
medicine.