Video Experimental Relacionado
Updated: Feb 15, 2026

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Assaying Protein Kinase Activity with Radiolabeled ATP
Published on: May 26, 2017
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Los ligandos del sitio ATP determinan el estado de montaje del núcleo regulador de la cinasa de Abelson a través de
Rajesh Sonti1, Ines Hertel-Hering1, Allan Joaquim Lamontanara2
1Focal Area Structural Biology and Biophysics, Biozentrum, University of Basel , CH-4056 Basel, Switzerland.
Journal of the American Chemical Society
|January 11, 2018
Resumen
El núcleo regulador de la Abl quinasa
Área de la Ciencia:
- La bioquímica
- Biología molecular
- Farmacología
Sus antecedentes:
- El núcleo regulador de la Abl quinasa comprende los dominios SH3, SH2 y quinasa.
- Estos dominios pueden existir en conformaciones ensambladas (inactivas) o desensambladas (activas).
Objetivo del estudio:
- Investigar la correlación entre la conformación del núcleo regulador de la Abl quinasa y el bucle de activación de la quinasa.
- Para entender el mecanismo de acción de los medicamentos inhibidores de Bcr-Abl aprobados por la FDA.
Principales métodos:
- Análisis de la conformación del bucle de activación de la quinasa.
- Estudiando el efecto de 14 ligandos del sitio de ATP, incluidos todos los inhibidores de Bcr-Abl aprobados por la FDA.
Principales resultados:
- El estado de ensamblaje del núcleo regulador de la kinasa Abl se correlaciona estrictamente con la conformación del bucle de activación de la kinasa.
- Los ligandos de tipo II inducen el desmontaje del núcleo empujando el lóbulo N a través de los bucles A y P hacia el dominio SH3.
- Este desmontaje facilita la unión y liberación de nucleótidos, lo que explica la actividad reducida de la quinasa en el estado ensamblado.
Conclusiones:
- La conformación del núcleo regulador de la Abl quinasa está intrínsecamente vinculada al bucle de activación de la quinasa.
- Los inhibidores Bcr-Abl aprobados por la FDA modulan el ensamblaje del núcleo y la conformación del bucle de activación.
- La comprensión de estos cambios conformacionales es crucial para las terapias dirigidas a Bcr-Abl.
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