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Una estrategia sinérgica de compartimentación y hidrofobia para aumentar sincrónicamente la estabilidad y la
Lihong Guo1,2, Rongwei He1,2, Guosheng Chen1,3
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
Journal of the American Chemical Society
|June 12, 2024
Resumen
Los investigadores desarrollaron una nueva estrategia de nanocarrier para inmovilizar la lipasa, mejorando tanto su estabilidad como su actividad catalítica. Esta lipasa modificada muestra un mejor rendimiento en la hidrólisis de ésteres y la catálisis enantioselectiva.
Área de la Ciencia:
- Biocatálisis
- Ciencias de los materiales
- Ingeniería de enzimas
Sus antecedentes:
- La inmovilización enzimática en los nanoportadores ofrece una mayor estabilidad y reciclabilidad para los biocatalizadores.
- Las enzimas inmovilizadas a menudo sufren una actividad reducida debido a limitaciones de transferencia de masa y cambios conformacionales.
- Desarrollar estrategias para mantener o aumentar la actividad enzimática tras la inmovilización es crucial.
Objetivo del estudio:
- Diseñar un sistema de nanocarrier que mejore simultáneamente la estabilidad de la lipasa y la actividad catalítica.
- Investigar los efectos de la estructura de los poros y la hidrofobia en el rendimiento de la lipasa inmovilizada.
- Demostrar la eficacia del biocatalizador diseñado en la catálisis enantioselectiva.
Principales métodos:
- Utilizando un marco metal-orgánico jerárquicamente poroso (NU-1003) con mesoporos y microporos interconectados.
- Modificación de los canales mesopóricos con ácidos grasos ajustables en cadena para crear un entorno hidrofóbico.
- Atrapar la lipasa dentro de los poros de ingeniería del marco NU-1003 modificado.
- Evaluación de la actividad y estabilidad de la lipasa inmovilizada en la hidrólisis de ésteres y reacciones enantioselectivas.
Principales resultados:
- El sistema de nanocarrier diseñado atrapó con éxito la lipasa, confiriendo una mayor estabilidad y actividad.
- Los poros interconectados facilitaron una comunicación eficiente entre el sustrato y la enzima.
- La modificación de ácidos grasos creó un entorno hidrofóbico que activó la conformación abierta de la lipasa.
- La lipasa inmovilizada exhibió una actividad 1,57 y 2,46 veces mayor en la hidrólisis de ésteres y en la catálisis enantioselectiva, respectivamente, en comparación con la lipasa nativa.
- El biocatalizador heterogéneo demostró una alta eficiencia en la resolución cinética de los enantiómeros.
Conclusiones:
- La ingeniería sinérgica de poros de marcos metal-orgánicos proporciona una estrategia viable para el desarrollo de biocatalizadores heterogéneos avanzados.
- Los efectos duales de la compartimentación de poros y la activación de la hidrofobia aumentan significativamente el rendimiento de la lipasa inmovilizada.
- Este enfoque ofrece una ruta prometedora para transformaciones enzimáticas eficientes y selectivas, particularmente en la síntesis quiral.
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