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Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
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Published on: July 25, 2013

Información evolutiva para especificar un pliegue de proteína.

Michael Socolich1, Steve W Lockless, William P Russ

  • 1Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9050, USA.

Nature
|September 24, 2005
PubMed
Resumen
Este resumen es generado por máquina.

Los científicos definieron las reglas de plegamiento de las proteínas utilizando solo datos de secuencias de aminoácidos. Las proteínas artificiales diseñadas con información coevolucionaria se plegaron con éxito en estructuras nativas, simplificando el problema del plegamiento de proteínas.

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Área de la Ciencia:

  • La bioquímica de las proteínas.
  • Biología computacional Biología computacional.
  • Biología estructural Biología estructural.

Sus antecedentes:

  • La secuencia de aminoácidos de las proteínas dicta su estructura terciaria.
  • Comprender las reglas de plegamiento de las proteínas es crucial para predecir la estructura y función de las proteínas.

Objetivo del estudio:

  • Para definir reglas de secuencia para el plegamiento de proteínas utilizando métodos computacionales.
  • Para investigar si la información estadística de múltiples alineaciones de secuencias es suficiente para especificar los pliegues de proteínas.

Principales métodos:

  • Secuencias de proteínas artificiales generadas por computación utilizando información estadística de múltiples alineaciones de secuencias.
  • Bibliotecas de secuencias de dominio WW artificiales probadas experimentalmente.
  • Utilizó una función de energía estadística que captura la coevolución de residuos.
  • Determinó la estructura de resolución atómica de una proteína artificial.

Principales resultados:

  • Una simple función de energía estadística era necesaria y suficiente para especificar secuencias que se pliegan en estructuras nativas.
  • Las proteínas artificiales del dominio WW exhibieron estabilidades termodinámicas comparables a las de los dominios WW naturales.
  • La estructura determinada de una proteína artificial mostró un alto acuerdo con el pliegue WW nativo.

Conclusiones:

  • El plegamiento de las proteínas se puede especificar utilizando solo información estadística de secuencias de aminoácidos, particularmente datos coevolucionarios.
  • El problema del plegamiento de proteínas puede ser menos complejo de lo que se pensaba anteriormente.
  • Este enfoque proporciona un método simplificado para diseñar proteínas con pliegues y funciones específicas.