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Interconversión mediada por la luz entre un Foldamer y un autorreplicador

Yulong Jin1,2, Pradeep K Mandal3, Juntian Wu4

  • 1Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, 100190 Beijing, China.

Journal of the American Chemical Society
|November 26, 2024
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio muestra cómo un bloque de construcción de una sola molécula puede formar fibras autorreplicantes o moléculas plegadas (foldamers) en un entorno de laboratorio. Los estímulos externos como la agitación y los cambios de pH controlan las formas de estructura, ofreciendo información sobre los orígenes de la vida.

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Área de la Ciencia:

  • El origen de los estudios de la vida
  • Química supramolecular
  • Química de los sistemas

Sus antecedentes:

  • Las moléculas autorreplicantes y las macromoléculas plegadas son cruciales para el surgimiento y la evolución de la vida.
  • La interacción entre estas estructuras en los sistemas abióticos no se entiende bien.

Objetivo del estudio:

  • Para demostrar un sistema abiótico donde un solo bloque de construcción puede formar moléculas auto-replicantes o foldamers.
  • Investigar los estímulos que controlan la formación de estas estructuras distintas.

Principales métodos:

  • Utilizó una biblioteca combinatoria dinámica basada en disulfuro.
  • Mecanoagitación aplicada y condiciones de pH controladas.
  • Se introdujo un fotoácido para manipular el pH con la luz.

Principales resultados:

  • Un solo bloque de construcción formado selectivamente por fibras hexámeras autorreplicantes bajo agitación y pH moderado.
  • Un foldamer macrocíclico de 15 subunidades formado transitoriamente y acumulado a un pH más bajo o sin agitación.
  • La interconversión entre foldamer y autorreplicador se logró a través de estímulos externos, incluidos los cambios de pH inducidos por la luz.

Conclusiones:

  • Demostró un sistema abiótico controlable que produce autorreplicantes o foldameres a partir de un solo precursor.
  • Mostró el potencial de los estímulos externos, incluida la luz, para impulsar las transiciones entre estos estados.
  • Proporcionó un sistema modelo para comprender el surgimiento de la complejidad y las estructuras disipativas en la vida temprana.