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Una bacteria que degrada y asimila el polietileno tereftalato
Shosuke Yoshida1, Kazumi Hiraga2, Toshihiko Takehana3
1Department of Applied Biology, Faculty of Textile Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. Department of Biosciences and Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
Science (New York, N.Y.)
|March 12, 2016
Resumen
Los investigadores descubrieron una nueva bacteria, Ideonella sakaiensis 201-F6, capaz de degradar el tereftalato de polietileno (PET, por sus siglas en inglés). Este microbio y sus enzimas ofrecen una solución potencial para el reciclaje de PET y la remediación ambiental.
Área de la Ciencia:
- Microbiología
- Ciencias del medio ambiente
- Biotecnología
Sus antecedentes:
- La acumulación de poli (tereftalato de etileno) (PET) plantea un importante desafío medioambiental a nivel mundial.
- Las estrategias actuales de biodegradación del PET son limitadas y se basan principalmente en unas pocas especies de hongos, lo que dificulta la remediación y el reciclaje efectivos.
- El desarrollo de soluciones microbianas para la degradación del plástico es crucial para la sostenibilidad ambiental.
Objetivo del estudio:
- Identificar nuevos microorganismos capaces de degradar el tereftalato de polietileno (PET).
- Investigar los mecanismos enzimáticos implicados en la biodegradación del PET por los microbios recién descubiertos.
- Evaluar el potencial de degradación microbiana para el reciclaje del PET y la remediación del medio ambiente.
Principales métodos:
- Evaluación de las comunidades microbianas naturales expuestas al PET en diversos entornos ambientales.
- Aislamiento y caracterización de cepas bacterianas potentes que degradan el PET.
- Análisis enzimático de la hidrólisis del PET y la producción de monómeros.
Principales resultados:
- Aislamiento de una nueva bacteria, Ideonella sakaiensis 201-F6, con la capacidad de utilizar el PET como fuente primaria de carbono y energía.
- Identificación de dos enzimas clave producidas por Ideonella sakaiensis 201-F6 que hidrolizan el PET de manera eficiente.
- Demostrar que estas enzimas convierten el PET en ácido tereftálico y etileno glicol, monómeros ecológicamente benignos.
Conclusiones:
- Ideonella sakaiensis 201-F6 representa un avance significativo en la degradación microbiana del PET.
- Las enzimas identificadas son cruciales para la descomposición eficiente del PET, allanando el camino para aplicaciones biotecnológicas.
- Este descubrimiento ofrece una vía prometedora para desarrollar estrategias sostenibles de reciclado de PET y limpieza ambiental.
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