Uptake of antimicrobial peptides. Required for the transport of microcin B17 (MccB17), microcin 25 (Mcc25) and proline-rich antimicrobial peptides (such as Cathelicidin-3 and Arasin 1) into the cell. Mutants are resistant to proline-rich antimicrobial peptides of eukaryotic origin. Belongs to the peptide uptake permease (PUP) (TC 9.A.18) family. Extended N-terminus.