title: Effect of amino acid substitution in the staphylococcal peptides warnericin RK and PSMα on their anti-Legionella and hemolytic activities.
abstract: Warnericin RK from Staphylococcus warneri and PSMα from Staphylococcus epidermidis are anti-Legionella peptides which were differently classified in a previous study according to their mode of action. Indeed, warnericin RK is highly hemolytic with a bactericidal mode of action, whereas PSMα is poorly hemolytic with a bacteriostatic mode of action toward L. pneumophila. In order to find anti-Legionella peptides which are not hemolytic, a collection of peptides varying in sequence from warnericin RK to PSMα were designed and synthesized, and their anti-Legionella activities, in terms of growth inhibition, permeabilization, and bactericidal effect, as well as their hemolytic activities, were measured and compared. The results showed that some residues, at position 14 for both peptides for instance, were of major importance for bactericidal and hemolytic activities.
authors: Université de Poitiers, Ecologie & Biologie des Interactions, CNRS UMR7267 Equipe Microbiologie de l'Eau, 1 Rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France.
authors: Adrienne
authors: A
authors: Marchand
authors: Jacques
authors: J
authors: Augenstreich
authors: Clémence
authors: C
authors: Loiseau
authors: Julien
authors: J
authors: Verdon
authors: Sophie
authors: S
authors: Lecomte
authors: Jean-Marc
authors: JM
authors: Berjeaud
mesh_terms: D019943:Amino Acid Substitution / Q000235:genetics*; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001427:Bacterial Toxins / Q000235:genetics* / Q000494:pharmacology; D001430:Bacteriocins / Q000235:genetics* / Q000494:pharmacology; D006461:Hemolysis / Q000187:drug effects* / Q000235:genetics; D007875:Legionella / Q000187:drug effects*; D010455:Peptides / Q000235:genetics* / Q000494:pharmacology; D010539:Permeability; D013210:Staphylococcus / Q000235:genetics*
chemical_list: D000900:Anti-Bacterial Agents; D001427:Bacterial Toxins; D001430:Bacteriocins; D010455:Peptides; C025971:staphylococcal delta toxin; C558932:warnericin RK, Staphylococcus warneri