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Elongamiento espontáneo y selectivo de péptidos en agua impulsado por ésteres de fosfato aminoacílico y cambios de
Kun Dai1, Mahesh D Pol1, Lenard Saile1
1DFG Cluster of Excellence livMatS @FIT─Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany.
Journal of the American Chemical Society
|November 22, 2023
Resumen
Los investigadores exploraron los ésteres de fosfato aminoacílico para la síntesis espontánea de péptidos en agua. Este enfoque de la química de sistemas permite el alargamiento selectivo y el autoensamblaje, ofreciendo nuevas vías para la formación de péptidos abióticos.
Área de la Ciencia:
- Química sintética
- Química de los sistemas
- La bioquímica
Sus antecedentes:
- La naturaleza utiliza los fosfatos para activar los aminoácidos para la síntesis de poliamida.
- Los mecanismos de alargamiento de péptidos abióticos en sistemas acuosos no se comprenden bien.
Objetivo del estudio:
- Investigar la química de los sistemas de ésteres de fosfato aminoacílico para el alargamiento espontáneo de péptidos en entornos acuosos.
- Explorar el papel de los ésteres de fosfato como etiquetas de solubilidad para los aminoácidos y oligómeros hidrofóbicos.
Principales métodos:
- Síntesis de ésteres de fosfato de aminoacilo como contrapartes sintéticas de los adenilatos de aminoacilo.
- Utilización de estos ésteres para permitir el alargamiento selectivo de péptidos y observar cambios de fase en soluciones acuosas.
- Investigar el aislamiento y la reutilización de las fases de solución para el alargamiento continuo.
Principales resultados:
- Los oligómeros hasta los dodecameros se sintetizaron rápidamente en un solo matraz mediante adiciones consecutivas y cambios de fase autónomos.
- Las fases formadas contenían péptidos no polares y oligómeros anfifílicos con ésteres de fosfato.
- Se encontraron oligómeros más cortos en solución, mientras que los oligómeros más largos se agregaron, impulsados por el autoensamblaje.
- Las fases de solución aisladas sirvieron como entornos para el alargamiento continuo de péptidos.
Conclusiones:
- Los ésteres de fosfato aminoacílico facilitan la formación espontánea y selectiva de enlaces péptidos en sistemas acuosos.
- El enfoque de la química de sistemas combina la síntesis acuosa con el autoensamblaje, ofreciendo un mecanismo de selección para la formación de péptidos.
- Este trabajo proporciona información sobre la síntesis de péptidos abióticos y el autoensamblaje relevantes para los estudios de origen de la vida.
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