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Updated: Jul 12, 2026

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay

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Published on: May 3, 2018

Aislamiento del gen humano cdk2 que codifica la ciclina A y la quinasa p33 asociada al adenovirus E1A y el adenovirus

L H Tsai¹, E Harlow, M Meyerson

¹Massachusetts General Hospital Cancer Center, Charlestown 02129.

|September 12, 1991

Resumen

Los investigadores identificaron la proteína p33 asociada a la ciclina A como el producto del gen cdk2. Este complejo de cinasa 2 dependiente de ciclina (cdk2) con ciclina A juega un papel único en la regulación del ciclo celular de los vertebrados.

Área de la Ciencia:

Biología Molecular Biología Molecular
Biología celular Biología celular.
La bioquímica es la bioquímica.

Sus antecedentes:

Las ciclinas son proteínas reguladoras que forman complejos con las quinasas, controlando la progresión del ciclo celular.
El complejo p34cdc2 / ciclina B es crucial para la transición de fase G2 a M.
La función de otros complejos de ciclina, como la ciclina A, sigue siendo en gran medida desconocida.

Objetivo del estudio:

Identificar el gen que codifica la proteína asociada a la ciclina A p33.3.
Para caracterizar el nuevo gen relacionado con cdc2, cdk2.
Para aclarar el papel del complejo p33cdk2 / ciclina A en la regulación del ciclo celular.

Principales métodos:

La clonación de nuevos genes humanos relacionados con cdc2.
Caracterización inmunocímica y cartografía proteolítica parcial.
Inmunoprecipitación de la proteína p33cdk2 para evaluar la actividad de la quinasa.

Principales resultados:

Se identificó el gen cdk2, que comparte identidad de secuencia significativa con p34cdc2.2.
El producto del gen cdk2 fue confirmado como la proteína asociada a la ciclina A p33.3.
p33cdk2 ha demostrado actividad de la proteína quinasa in vitro.

Conclusiones:

El producto del gen cdk2 es la p33.3 asociada a la ciclina A.
El complejo p33cdk2 / ciclina A está implicado en la regulación del ciclo celular.
La oncoproteína viral E1A interactúa con el complejo p33cdk2 / ciclina A.

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