Small Peptides Derived from Penetratin as Antibacterial Agents

Autor: Aníbal Alejandro Tapia, Javier López Cascales, Csaba Somlai, András Perczel, Adriana Garro, Gabriela Egly Feresin, Ana M. Rodríguez, Gábor Tóth, Beatriz Lima, Oscar Parravicini, Ricardo D. Enriz, Sebastian A. Andujar
Rok vydání: 2016
Předmět:
Zdroj: Archiv der Pharmazie. 349:242-251
ISSN: 0365-6233
DOI: 10.1002/ardp.201500419
Popis: The synthesis, in vitro evaluation and conformational study of several small-size peptides acting as antibacterial agents are reported. Among the compounds evaluated, the peptides Arg-Gln-Ile-Lys-Ile-Trp-Arg-Arg-Met-Lys-Trp-Lys-Lys-NH2 , Arg-Gln-Ile-Lys-Ile-Arg-Arg-Met-Lys-Trp-Arg-NH2 , and Arg-Gln-Ile-Trp-Trp-Trp-Trp-Gln-Arg-NH2 exhibited significant antibacterial activity. These were found to be very active antibacterial compounds, considering their small molecular size. In order to better understand the antibacterial activity obtained for these peptides, an exhaustive conformational analysis was performed, using both theoretical calculations and experimental measurements. Molecular dynamics simulations using two different media (water and trifluoroethanol/water) were employed. The results of these theoretical calculations were corroborated by experimental circular dichroism measurements. A brief discussion on the possible mechanism of action of these peptides at molecular level is also presented. Some of the peptides reported here constitute very interesting structures to be used as starting compounds for the design of new small-size peptides possessing antibacterial activity.
Databáze: OpenAIRE
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