Journal of Microbiology

Research Support, Non-U.S. Gov't

Note] Antibacterial Activity of Recombinant hCAP18/LL37 Protein Secreted from Pichia pastoris: Soon-ja Kim , Renshu Quan , Sung-Jin Lee , Hak-Kyo Lee , Joong-Kook Choi; J. Microbiol. 2009;47(3):358-362. Published online June 26, 2009; DOI: https://doi.org/10.1007/s12275-009-0131-9

Abstract: Human antimicrobial peptide CAP18/LL37 (hCAP18/LL37) was expressed in Pichia pastoris and its antibacterial activity was tested against pathogenic bacteria. The full length ORF of hCAP18/LL37 was cloned into the pPICZαA vector followed by integration into the genomic AOX1 gene of P. pastoris. Agar diffusion assay demonstrated that the different hCAP18/LL37 transformants showed various antibacterial activities against Staphylococcus aureus, Micrococcus luteus, and Salmonella gastroenteritis. The secreted form of hCAP18/LL37 exhibited its maximum activity after 72 h incubation with 2% methanol in MM media, not in BMM. This result suggests that the yeast secreted expression system can be used as a production tool of antimicrobial peptides for industrial or pharmaceutical application.

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