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Updated: Jan 23, 2026

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DBGT-PLA: Predicción de la afinidad de unión de proteínas y ligandos mediante fusión de Graph-Transformer de doble
IEEE journal of biomedical and health informatics
|January 21, 2026
Resumen
Desarrollamos un nuevo marco, DBGT-PLA, para predecir la afinidad de unión de proteínas y ligandos. Este modelo interpretable mejora la precisión y revela que las interacciones del ligando son los principales impulsores de la afinidad de unión, lo que ayuda al descubrimiento de fármacos.
Área de la Ciencia:
- Química computacional y quimioinformática
- Descubrimiento y desarrollo de fármacos
- Bioinformática y biología computacional
Sus antecedentes:
- La predicción precisa de la afinidad de unión de proteínas y ligandos es crucial para el descubrimiento eficiente de fármacos.
- Los métodos computacionales existentes enfrentan desafíos para capturar simultáneamente detalles atómicos locales e información contextual global.
Objetivo del estudio:
- Presentar el marco interpretable de Graph-Transformer de doble rama para la predicción de la afinidad de unión de proteínas y ligandos (DBGT-PLA).
- Mejorar la modelización conjunta de las interacciones atómicas locales y las dependencias contextuales globales en sistemas de proteínas y ligandos.
- Proporcionar información cuantitativa sobre los determinantes de la afinidad de unión para la optimización racional de fármacos.
Principales métodos:
- Una novedosa arquitectura de doble rama que integra una Red Neuronal de Grafos (GNN) con un Transformer mejorado en estabilidad.
- Un módulo de fusión de aprendizaje residual con compuerta (GRL) para la integración adaptativa de la topología del grafo y el contexto del Transformer.
- Un marco de atribución de Shapley a nivel de arista para cuantificar las contribuciones de interacciones específicas dentro de los grafos de proteínas y ligandos.
Principales resultados:
- DBGT-PLA logró una reducción significativa del Error Cuadrático Medio (RMSE) del 18,3% en un conjunto de datos de referencia.
- El modelo superó a los métodos existentes de última generación en la predicción de la afinidad de unión de proteínas y ligandos.
- El módulo de explicabilidad identificó las características basadas en ligandos como contribuyentes dominantes (casi el 70%) a las predicciones de afinidad.
Conclusiones:
- DBGT-PLA ofrece una precisión e interpretabilidad mejoradas para la predicción de la afinidad de unión de proteínas y ligandos.
- El marco proporciona información cuantitativa valiosa sobre las interacciones moleculares que rigen la afinidad de unión.
- Este enfoque puede guiar estrategias de diseño de fármacos más efectivas y racionales.
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