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Biomimetic Materials to Characterize Bacteria-host Interactions
Published on: November 16, 2015
Interacción entre el plegamiento, la secuencia y la lipofilia en las actividades antibacterianas y hemolíticas de los
Margaret A Schmitt1, Bernard Weisblum, Samuel H Gellman
1Departments of Chemistry and Pharmacology, University of Wisconsin, Madison, Wisconsin 53706, USA.
Journal of the American Chemical Society
|January 11, 2007
Resumen
No se requieren hélices anfifílicas globales para la actividad antibacteriana selectiva en péptidos alfa/beta. Este hallazgo avanza en el diseño de nuevos agentes antibacterianos al desacoplar la conformación de la función.
Área de la Ciencia:
- Química Medicinal La Química Medicinal es un campo de estudio de la química medicinal.
- La bioquímica es la bioquímica.
- Química orgánica es la química orgánica.
Sus antecedentes:
- Los péptidos de defensa del huésped exhiben una potente actividad antibacteriana con baja toxicidad eucariota.
- Muchos péptidos de defensa del huésped adoptan estructuras globalmente anfifílicas alfa-hélices.
- Los oligómeros no naturales tienen como objetivo imitar las propiedades antibacterianas selectivas de estos péptidos.
Objetivo del estudio:
- Investigar los requisitos estructurales para la actividad antibacteriana selectiva en péptidos alfa/beta.
- Aclarar los orígenes de la actividad biológica inesperada en secuencias anfifílicas no globales.
- Para evaluar la estabilidad proteolítica de los péptidos alfa/beta.
Principales métodos:
- Síntesis y caracterización de un conjunto diverso de péptidos alfa/beta.
- Pruebas biológicas para evaluar la actividad antibacteriana y la toxicidad eucariota.
- Estudios de degradación proteolítica.
Principales resultados:
- Los péptidos alfa/beta que carecen de estructuras helicoidales anfifílicas globales mostraron una actividad biológica favorable.
- La capacidad de formar una hélice anfifílica global no es esencial para la acción antibacteriana selectiva.
- Se evaluó la susceptibilidad a la degradación proteolítica de los péptidos sintetizados.
Conclusiones:
- La conformación helicoidal anfifílica global no es un requisito previo para la actividad antibacteriana selectiva en los péptidos alfa/beta.
- Los hallazgos desafían los paradigmas existentes e informan el diseño de nuevos agentes antibacterianos.
- Esta investigación avanza en la comprensión de las relaciones estructura-actividad en oligómeros no naturales.
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