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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Diversificación de la estructura de la jaula de proteínas utilizando subunidades permutadas circularmente

Yusuke Azuma1, Michael Herger1, Donald Hilvert1

  • 1Laboratory of Organic Chemistry, ETH Zurich , 8093 Zurich, Switzerland.

Journal of the American Chemical Society
|December 20, 2017
PubMed
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Los investigadores diseñaron una proteína sintasa de lumazina permutada circularmente (cpAaLS) para crear jaulas de proteínas versátiles. Este nuevo bloque de construcción permite estructuras ajustables y diversas aplicaciones en biotecnología y medicina.

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Área de la Ciencia:

  • Biotecnología
  • Ingeniería de proteínas
  • Nanotecnología

Sus antecedentes:

  • Las jaulas de proteínas autoensamblables son contenedores valiosos a nanoescala para la biotecnología y la medicina.
  • La personalización de las proteínas de la jaula natural y el diseño de otras nuevas es crucial para expandir su utilidad.

Objetivo del estudio:

  • Para diseñar un bloque de construcción versátil para construir nanocompartimentos de proteínas personalizados.
  • Explorar el potencial de la permutación circular para adaptar las propiedades de las proteínas de la jaula.

Principales métodos:

  • Permutación circular de Aquifex aeolicus lumazina sintasa (AaLS) para crear cpAaLS.
  • Autoensamblaje de las cpAaLS en jaulas esféricas y tubulares.
  • Co-producción de cpAaLS con AaLS de tipo silvestre para formar jaulas de mosaico.

Principales resultados:

  • cpAaLS se autoensambla en estructuras de jaula esféricas y tubulares controlables.
  • Las jaulas de parche formadas por coensamblaje permiten la encapsulación de proteínas huéspedes y la modificación exterior.
  • La estrategia permite ajustar el tamaño del compartimento y la electrostática.

Conclusiones:

  • El AaLS permutado circularmente (cpAaLS) proporciona bloques de construcción versátiles para los nanocompartimentos de proteínas.
  • El coensamblaje ofrece un método para crear jaulas de proteínas funcionales y a medida.
  • La permutación circular es una estrategia prometedora para la ingeniería de la jaula de proteínas.