Amphipathic alpha-helical antimicrobial peptide with moderate activity against Gram-positive bacteria (MIC=100 ug/mL against L.lactis and MIC=50 ug/mL against S.uberis) (PubMed:10951191). Has no activity against Gram-negative bacteria (PubMed:10951191). Expressed by the skin dorsal glands. Belongs to the frog skin active peptide (FSAP) family. Aurein subfamily. Aurein 5.2 may be a deamidated form of aurein 5.3.