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Cadenas de transferencia de electrones extracelulares e intracelulares acopladas en metanógenos: mecanismos,

Pengyu Chen¹, Shuai Tang¹, Buchun Si¹

¹Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture and Rural Affairs, College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China; State Key Laboratory of Efficient Utilization of Agricultural Water Resources, China Agricultural University, Beijing, 100083, China.

|August 27, 2025

Resumen

Las interacciones sintróficas entre acetógenos y metanógenos son cruciales para la digestión anaeróbica (DA). Esta revisión explora los mecanismos de transferencia de electrones, que vinculan los procesos extracelulares e intracelulares para mejorar la producción de energía microbiana y la remediación ambiental.

Área de la Ciencia:

Microbiología
La bioquímica
Ciencias del medio ambiente

Sus antecedentes:

Las interacciones sintróficas entre acetógenos y metanógenos son vitales para la digestión anaeróbica (DA), lo que permite la producción de energía microbiana y la remediación ambiental.
La transferencia de electrones, tanto extracelular (MIET, DIET) como intracelular (ETP, FBEB), es fundamental para estas actividades metabólicas.
La comprensión del acoplamiento de estas vías de transferencia de electrones en los metanógenos sigue siendo una brecha de conocimiento.

Objetivo del estudio:

Revisar y dilucidar los mecanismos de la transferencia de electrones interespecies mediada (MIET), la transferencia directa de electrones interespecies (DIET) y la bifurcación de electrones a base de flavina (FBEB).
Para resaltar los mecanismos moleculares que acoplan los procesos de transferencia de electrones extracelulares e intracelulares en los metanógenos.
Analizar estrategias optimizadas de transferencia de electrones y conservación de energía para mejorar la AD.

Principales métodos:

Revisión de la literatura centrada en los mecanismos de transferencia de electrones en la digestión anaeróbica.
Análisis de las vías moleculares involucradas en MIET, DIET y FBEB.
Síntesis de información sobre el acoplamiento de las cadenas de transferencia de electrones extracelulares e intracelulares.

Principales resultados:

Examen detallado de los mecanismos MIET, DIET y FBEB y sus funciones en las interacciones sintróficas.
Identificación de los enlaces moleculares entre los procesos de transferencia de electrones extracelulares e intracelulares.
Análisis de cómo las cadenas de transferencia de electrones acopladas optimizan la conservación de energía y la eficiencia microbiana.

Conclusiones:

El acoplamiento de DIET y FBEB presenta una nueva estrategia para mejorar la eficiencia y la adaptabilidad de AD.
La vinculación de cadenas de transferencia de electrones intracelulares y extracelulares ofrece un potencial para mejorar el tratamiento de las aguas residuales y la protección del ecosistema.
La investigación adicional sobre estas vías acopladas puede avanzar significativamente en las tecnologías de AD.

Palabras clave:

Digestión anaeróbica Bifurcación de electrones a base de flavina Transferencia de electrones entre especies Microorganismos sintróficos y sus derivados

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