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Emergencia en cascada, impulsada por retroalimentación y espacialmente localizada de redes dinámicas constitucionales
Zhixin Zhou1, Nina Lin1, Yu Ouyang2
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
Journal of the American Chemical Society
|May 31, 2023
Resumen
El ensamblaje catalítico de alfileres (CHA) permite la creación y evolución de redes complejas de ácidos nucleicos. Este método libre de enzimas ofrece información sobre los orígenes de los sistemas dinámicos y su potencial para aplicaciones intracelulares.
Área de la Ciencia:
- La bioquímica
- Biología sintética
- El origen de los estudios biológicos
Sus antecedentes:
- Las redes dinámicas constitucionales (CDN, por sus siglas en inglés) son sistemas capaces de autoensamblarse y adaptarse.
- Los sistemas basados en ácido nucleico ofrecen una plataforma versátil para construir redes dinámicas.
- Comprender la aparición y evolución de sistemas moleculares complejos es crucial para la biología sintética y la astrobiología.
Objetivo del estudio:
- Introducir el ensamblaje catalítico sin enzimas (CHA) como método para crear y desarrollar CDN basadas en ácido nucleico.
- Demostrar el ensamblaje de CDN con complejidad, funcionalidad y confinamiento espacial variables.
- Explorar posibles vías prebióticas para la evolución de las redes dinámicas y sus aplicaciones bioanalíticas.
Principales métodos:
- Utilizó horquillas de ácido nucleico estructuralmente diseñadas y hebras promotoras para iniciar reacciones de CHA.
- CDN [2x2] y [3x3] ensambladas, marcos de CDN 3D y circuitos en cascada.
- Empleó nanoestructuras de tetraedro de ADN para la reconfiguración dinámica y la entrega intracelular.
- Módulos de reacción de CHA integrados en las células para la obtención de imágenes lógicas de ARN intracelulares.
Principales resultados:
- Demostró con éxito la aparición y evolución guiadas por CHA de CDN de complejidad creciente.
- Creó marcos de CDN 3D que imitan las redes reguladoras de genes y las CDN dinámicas basadas en tetraedros de ADN.
- Se logró la entrega intracelular de módulos de reacción de CHA para la evolución de CDN desencadenada por miRNA.
- Se habilitó la imagen de ARN intracelulares mediante la reconfiguración de CDN localizada espacialmente.
Conclusiones:
- CHA proporciona una plataforma potente y libre de enzimas para construir y evolucionar CDN funcionales de ácido nucleico.
- El estudio presenta vías mecanicistas plausibles para la evolución de redes dinámicas en condiciones prebióticas.
- Los sistemas integrados de CHA son prometedores para aplicaciones bioanalíticas avanzadas, incluida la imagen por lógica intracelular.
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