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Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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La escritura forzada de la memoria: la isomerización de la prolina como interruptor molecular de la memoria

Ionel Popa1, Ronen Berkovich2

  • 1Department of Physics and Astronomy, University of Wisconsin-Milwaukee, Milwaukee, WI, 53211, U.S.A.

Biochemical Society transactions
|December 24, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Las fuerzas mecánicas permiten la memoria celular a través del despliegue y repliegue de proteínas. La isomerización de la prolina crea memoria mecánica adaptativa, crucial para biomateriales y biorrobótica.

Palabras clave:
biofísicaseñalización intracelularaprendizaje y memoriamecanotransducciónisomerización de la prolinadinámica de proteínas

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Área de la Ciencia:

  • Biofísica
  • Mecanobiología
  • Ciencia de Materiales

Sus antecedentes:

  • Las fuerzas mecánicas son reguladores críticos de las funciones celulares.
  • Las células exhiben formas de memoria molecular influenciadas por señales mecánicas.
  • La dinámica de las proteínas bajo carga es clave para comprender las respuestas celulares.

Objetivo del estudio:

  • Revisar los mecanismos de la memoria mecánica en las células.
  • Explorar el papel del despliegue/repliegue de proteínas en la memoria mecánica.
  • Destacar la isomerización de la prolina como un interruptor molecular clave para la memoria.

Principales métodos:

  • Revisión de la literatura que integra datos experimentales y simulaciones de dinámica molecular.
  • Análisis del despliegue y repliegue de proteínas bajo cargas de tracción.
  • Enfoque en la isomerización de la prolina como mecanismo de memoria mecánica.

Principales resultados:

  • El despliegue y repliegue de proteínas generan respuestas celulares dependientes de la historia.
  • La isomerización de la prolina actúa como un interruptor reversible, creando estados cuasiestables.
  • Este mecanismo apoya la memoria mecánica a medio y largo plazo.
  • Se propone una respuesta de memoria graduada y adaptativa, que difiere de los interruptores binarios.

Conclusiones:

  • La isomerización de la prolina proporciona un marco para la memoria mecánica celular.
  • Este mecanismo tiene implicaciones significativas para el diseño de biomateriales y robótica blanda.
  • Se pueden desarrollar materiales sensibles a la fuerza con propiedades de memoria para la ingeniería de tejidos y la robótica.