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La hidrolasa de cocaína más eficiente diseñada mediante el cribado virtual de estados de transición
Fang Zheng1, Wenchao Yang, Mei-Chuan Ko
1Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 725 Rose Street, Lexington, Kentucky 40536, USA.
Journal of the American Chemical Society
|August 20, 2008
Resumen
Los científicos diseñaron un mutante de la enzima butirilcolinesterasa humana (BChE) altamente eficiente para metabolizar rápidamente la cocaína. Este avance ofrece una nueva estrategia terapéutica potencial para el tratamiento de la adicción a la cocaína y la sobredosis.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Ingeniería de enzimas Ingeniería de enzimas Ingeniería de enzimas
- Farmacología Farmacología.
Sus antecedentes:
- La adicción a la cocaína plantea importantes desafíos médicos y sociales, y actualmente no hay medicamentos anti-cocaína disponibles.
- Acelerar el metabolismo de la cocaína a través de la hidrólisis, similar a la vía natural de la butirilcolinesterasa (BChE), es un objetivo terapéutico clave.
- El BChE de tipo silvestre exhibe una baja eficiencia catalítica contra la cocaína, lo que requiere la mejora de la enzima.
Objetivo del estudio:
- Diseñar y descubrir un mutante de alta actividad de BChE humano para mejorar el metabolismo de la cocaína.
- Desarrollar un nuevo enfoque computacional para el rediseño racional de enzimas.
Principales métodos:
- Utilizó una estrategia de diseño computacional sistemática.
- Empleado simulaciones de estado de transición y cálculos de energía de activación.
- Centrado en mejorar la eficiencia catalítica del BChE humano para la hidrólisis de la cocaína.
Principales resultados:
- Descubrió un mutante humano de BChE con una eficiencia catalítica mejorada de aproximadamente 2000 veces contra la cocaína.
- Identificó la hidrolasa de cocaína más eficiente hasta la fecha.
- Demostró la eficacia del enfoque de diseño computacional.
Conclusiones:
- El mutante modificado de BChE es prometedor como terapia enzimática exógena para la sobredosis y adicción a la cocaína.
- El nuevo método de diseño computacional es ampliamente aplicable para el rediseño de enzimas y el descubrimiento de fármacos.
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