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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...
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Secuestro del tren de electrones: péptidos antimicrobianos que se unen a las menaquinonas

Eilidh J Matheson1, Stephen A Cochrane1

  • 1School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.

Chembiochem : a European journal of chemical biology
|August 26, 2025
PubMed
Resumen

La resistencia a los antibióticos es una gran amenaza. Dirigir la menaquinona (MK) con péptidos antimicrobianos que se unen a la menaquinona (MBAMPs) ofrece una nueva estrategia contra las bacterias resistentes, con avances recientes en su descubrimiento y desarrollo.

Palabras clave:
Los antibióticosPéptidos antimicrobianosLa menaquinonaPéptidos no ribosómicospolipreniles y sus derivados

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Área de la Ciencia:

  • Microbiología
  • Química medicinal
  • Descubrimiento de drogas

Sus antecedentes:

  • La resistencia a los antibióticos representa una amenaza crítica para la salud mundial, que requiere el desarrollo urgente de nuevos agentes antimicrobianos y objetivos terapéuticos.
  • La menaquinona (MK), un portador de electrones bacteriano, representa un objetivo prometedor y selectivo para nuevos antibióticos debido a su papel esencial en el transporte de electrones bacterianos.
  • Los péptidos antimicrobianos que se unen a las menaquinonas (MBAMPs) han surgido como una nueva clase potencial de antibióticos, distintos de los medicamentos existentes.

Objetivo del estudio:

  • Revisar los avances recientes en el campo de los MBAMP.
  • Para resaltar el descubrimiento, la caracterización, la síntesis y la comprensión mecánica de MBAMPs.
  • Subrayar el potencial de los MBAMP en la lucha contra la resistencia a los antimicrobianos.

Principales métodos:

  • Revisión de la literatura sobre las investigaciones recientes sobre las MBAMP.
  • Análisis de estudios que detallan el descubrimiento y la caracterización de los MBAMP naturales y sintéticos.
  • Examen de la investigación sobre la síntesis, la derivación y las acciones mecanicistas de los MBAMP.

Principales resultados:

  • Se han identificado y caracterizado varios MBAMPs, incluida la lisocina E.
  • Los avances en química sintética han permitido la creación y modificación de MBAMPs.
  • Una comprensión creciente de los mecanismos de MBAMP proporciona información sobre su actividad antimicrobiana.

Conclusiones:

  • Los MBAMP representan una nueva vía prometedora para el desarrollo de antibióticos contra patógenos resistentes.
  • La investigación adicional sobre los MBAMP es crucial para desarrollar su potencial terapéutico.
  • Dirigirse a la menaquinona ofrece una estrategia selectiva para superar los mecanismos de resistencia a los antibióticos existentes.