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Synthesis of an Intein-mediated Artificial Protein Hydrogel
Published on: January 27, 2014
Desarrollo de un sistema de transesplicado de proteínas en tándem basado en inteínas divididas nativas y de
1Laboratory of Synthetic Protein Chemistry, The Rockefeller University, 1230 York Avenue, New York, New York 10021, USA.
Journal of the American Chemical Society
|April 28, 2005
Resumen
Las inteinas divididas permiten el trans-esplicado de proteínas para la biotecnología. Este estudio revela una rápida asociación de fragmentos impulsada por la electrostática, lo que permite un nuevo sistema en tándem para el etiquetado de proteínas grandes.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología Molecular Biología Molecular
- Biotecnología La biotecnología es la biotecnología.
Sus antecedentes:
- El trans-splicing de proteínas utiliza inteínas divididas para ligar polipéptidos.
- La comprensión del reconocimiento molecular de la asociación de fragmentos de inteín dividido es limitada.
- Los inteínos divididos tienen diversas aplicaciones en biología química y biotecnología.
Objetivo del estudio:
- Para investigar el reconocimiento molecular que gobierna la asociación de fragmentos divididos intein.
- Para cuantificar la afinidad de unión y la cinética de la interacción entre el Ssp DnaE dividido.
- Desarrollar un nuevo sistema tándem de transesplicado para el ensamblaje y etiquetado de proteínas.
Principales métodos:
- Se emplearon ensayos basados en fluorescencia para medir la afinidad de unión (constante de disociación).
- Se determinaron las tasas de activación y desactivación de la asociación de fragmentos.
- Se diseñó un sistema de transesplicado en tándem utilizando inteles divididos nativos y modificados.
Principales resultados:
- Los fragmentos de Ssp DnaE divididos entre sí exhiben una baja afinidad de unión nanomolar.
- Las interacciones electrostáticas contribuyen significativamente a la rápida asociación de fragmentos a pH fisiológico.
- Se desarrolló con éxito un sistema de trans-espleaje en tándem de una sola olla para ensamblar tres polipéptidos.
Conclusiones:
- La asociación de fragmentos divididos entre sí es rápida y está impulsada electrostáticamente.
- El sistema desarrollado de tandem trans-splicing facilita el ensamblaje eficiente de proteínas en condiciones nativas.
- Esta tecnología ofrece un método conveniente para el etiquetado segmental de grandes proteínas multidominio.
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