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La oxidación del sulfuro de hidrógeno está acoplada a la fosforilación oxidativa en las mitocondrias de Solemya
Science (New York, N.Y.)
|August 1, 1986
Resumen
La almeja sin tripa Solemya reidi utiliza directamente la oxidación de sulfuro para la producción de energía. Este proceso, que ocurre en los tejidos animales, proporciona la síntesis de trifosfato de adenosina (ATP), lo que sugiere mecanismos similares en otros animales que viven en los sulfuros.
Área de la Ciencia:
- Biología marina Biología marina.
- La bioquímica es la bioquímica.
- La investigación de la simbiosis es la investigación de la simbiosis.
Sus antecedentes:
- Solemya reidi, una almeja sin agallas, habita en ambientes ricos en sulfuro.
- Alberga simbiontes bacterianos en sus branquias, presuntamente para oxidar los compuestos de azufre para la nutrición.
Objetivo del estudio:
- Para investigar los pasos iniciales de la oxidación del sulfuro en Solemya reidi.
- Para determinar si los propios tejidos de la almeja pueden utilizar directamente el sulfuro para obtener energía.
Principales métodos:
- Aislamiento de mitocondrias de las branquias y los tejidos de los pies de Solemya reidi.
- Medición de la oxidación del sulfuro junto con la fosforilación oxidativa (síntesis de ATP) en mitocondrias aisladas.
Principales resultados:
- Las mitocondrias tanto de las branquias como del tejido del pie libre de simbiontes demostraron oxidación de sulfuro acoplada a la síntesis de ATP.
- Esto indica la producción directa de energía a partir del sulfuro por los propios tejidos de la almeja.
Conclusiones:
- Solemya reidi puede aprovechar directamente la energía de la oxidación del sulfuro para la síntesis de trifosfato de adenosina (ATP).
- Esta capacidad es independiente de sus simbiontes bacterianos y sugiere una estrategia energética potencial para otros animales con hábitat de sulfuro que carecen de simbiontes.
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