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A novel method, based on the hemolytic screening of a cDNA phage library, was developed to isolate cDNAs encoding grammistins (antibacterial peptide toxins) of the soapfish Pogonoperca punctata. As a result, cDNAs encoding six grammistins were isolated and elucidated for their nucleotide sequences. In common with the grammistins, the precursor protein is composed of a highly conserved signal peptide,...
Grammistins, peptide toxins isolated from the skin secretions of two species of soapfishes Grammistes sexlineatus and Pogonoperca punctata, are new members of the family of linear membrane-lytic antibacterial peptides characterized by the abundance of amphiphilic α-helices. As the first step toward future use of grammistins to examine the mode of membrane lysis and design new antibiotics, C-terminally...
Soapfishes contain peptide toxins (grammistins) in the skin secretion. Two grammistins (Gs 1 and Gs 2) and six grammistins (Pp 1, Pp 2a, Pp 2b, Pp 3, Pp 4a and Pp 4b) have already been isolated from Grammistes sexlineatus and Pogonoperca punctata, respectively. In this study, five grammistins (Gs A–E), together with grammistins Gs 1 and Gs 2, were further isolated from G. sexlineatus by gel filtration...
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