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Codificación y decodificación de la selectividad y la promiscuidad en la red de interacción quimioquina-GPCR humana

Andrew B Kleist¹, Martyna Szpakowska², Lindsay J Talbot³

¹Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, USA; Medical Scientist Training Program, Medical College of Wisconsin, Milwaukee, WI, USA; MRC Laboratory of Molecular Biology, Cambridge, UK.

|April 24, 2025

Resumen

Los investigadores identificaron los determinantes moleculares clave que rigen las interacciones de las quimiocinas y los receptores acoplados a proteínas G (GPCR). La comprensión de estos elementos permite la ingeniería de nuevas quimioquinas para aplicaciones terapéuticas.

Área de la Ciencia:

Inmunología
Biología molecular
Biología estructural

Sus antecedentes:

Las interacciones con los receptores de quimiocinas son cruciales para la migración celular, formando una red compleja que involucra a 46 ligandos y 23 receptores acoplados a proteínas G (GPCR).
La base molecular para la unión selectiva y promiscua de las quimiocinas a sus GPCR sigue siendo en gran medida desconocida a pesar de los andamios estructurales compartidos.

Objetivo del estudio:

Aclarar los principios moleculares que dictan la selectividad y la promiscuidad en las interacciones quimioquina-GPCR.
Identificar los determinantes conservados y variables responsables de mediar estas interacciones específicas proteína-proteína.

Principales métodos:

Análisis de determinantes conservados, semiconservados y variables dentro de las secuencias de quimiocinas y GPCR.
Reconocimiento combinatorio de estos determinantes por ligandos y receptores a través de regiones de proteínas estructuradas y no estructuradas.
Ingeniería de una quimioquina viral para demostrar preferencias de acoplamiento de GPCR alteradas basadas en principios identificados.

Principales resultados:

Identificación de un conjunto de elementos de reconocimiento conservados y variables que rigen la especificidad de unión de las quimiocinas y los GPCR.
Demostración de que la selectividad y la promiscuidad surgen de una combinación de determinantes generalizados y específicos.
Ingeniería exitosa de una quimioquina viral con perfiles de interacción GPCR modificados.

Conclusiones:

La especificidad de la interacción quimioquina-GPCR se determina mediante un código combinatorio de determinantes moleculares conservados y variables.
Estos hallazgos proporcionan un marco para la comprensión y la ingeniería de las interacciones quimioquina-GPCR.
El estudio ofrece un recurso web para ayudar en el diseño de proteínas para el desarrollo de inmunoterápicos y terapias celulares.

Palabras clave:

GPCR y sus derivados Las quimiocinas quimiotaxis Ciencia de los datos Aprendizaje automático Polimorfismo Interacción proteína-proteína Determinantes de la selectividad motivo lineal corto Proteínas no estructuradas

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