Novel Cathelicidin Antimicrobial Peptides from Paa robertingeri

ABSTRACT

This study aimed to describe two cathelicidins (cathelicidin-PR1 and cathelicidin-PR2) from the skin of Paa robertingeri (Anura Ranidae). The deduced mature peptides cathelicidin-PR1 and cathelicidin-PR2 were composed of 29 and 25 residues, respectively. Cathelicidin - PR1 has higher antimicrobial activity it could kill Gram-positive and Gram-negative bacteria and even some fungal species. Cathelicidin-PR1 exhibited more effective than AMP in antimicrobial activity against Pseydomonas maltophilia clinical strain. On the contrary, cathelicidin-PR2 had very weak antimicrobial activity. Furthermore, cathelicidin-PR1 and cathelicidin-PR2 exhibited very low hemolytic activity against human erythrocytes and little hemagglutinating activity. The results suggested that the cathelicidin-PR1 might serve as a template for developing novel antibiotics.