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Updated: Jul 15, 2025

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Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
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Los complejos de metal y ADP promueven la fosforilación de los ribonucleótidos
Emilie Werner1, Silvana Pinna1, Robert J Mayer1
1ISIS UMR 7006, University of Strasbourg, CNRS, 67000 Strasbourg, France.
Journal of the American Chemical Society
|September 26, 2023
Resumen
El difosfato de adenosina (ADP) con iones metálicos como Fe3+ o Al3+ puede fosforilar otros nucleótidos en el agua sin enzimas. Este hallazgo arroja luz sobre los orígenes prebióticos de las moléculas biológicas esenciales.
Área de la Ciencia:
- La bioquímica
- Astrobiología
- Química prebiótica
Sus antecedentes:
- La fosforilación catalizada por enzimas de los difosfatos de ribonucleótidos (NDP) a los trifosfatos de ribonucleótidos (NTP) es crucial para la biosíntesis del ARN.
- El papel de la fosforilación no enzimática en las primeras condiciones de la Tierra y la especificidad de los derivados de la adenosina siguen sin estar claros.
Objetivo del estudio:
- Investigar el potencial de la fosforilación de nucleótidos no enzimáticos en condiciones prebióticas.
- Comprender por qué los derivados de la adenosina están específicamente involucrados en la fosforilación biológica.
Principales métodos:
- Se estudió la fosforilación de los NDP utilizando fosfato de acetil como donante de fosforilo.
- Se investigó el papel catalítico del difosfato de adenosina (ADP) en presencia de Fe3+ o Al3+ en solución acuosa a temperatura ambiente.
- Se examinó el efecto de otros NDP y de los monofosfatos ribonucleósidos (NMP) en reacciones similares.
Principales resultados:
- El ADP, complejo con Fe3+ o Al3+, catalizó efectivamente la fosforilación de todos los NDP canónicos a NTP en agua sin enzimas.
- Ningún otro NDP exhibió una actividad catalítica similar, apoyando el papel específico de los derivados de la adenosina.
- Los complejos ADP-metal también fosforilaban NMP a NDP y NTP, aunque de manera menos eficiente.
Conclusiones:
- Los complejos ADP-metal representan un mecanismo plausible para la fosforilación de nucleótidos prebióticos, crucial para el origen de la vida.
- Esta actividad no enzimática destaca una función clave de los derivados de la adenosina en la química biológica temprana.
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