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La activación transcripcional por el oncogén v-myb y su progenitor celular, c-myb
1Department of Microbiology and Immunology, University of California, San Francisco 94143-0552.
Cell
|July 14, 1989
Resumen
El oncogén del v-myb es el v-myb.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Oncología Oncología.
Sus antecedentes:
- El oncogén v-myb codifica una proteína nuclear que regula el crecimiento y la diferenciación celular.
- Su contraparte celular es el c-myb.
Objetivo del estudio:
- Para identificar el dominio v-myb responsable de la activación de la transcripción.
- Para investigar el papel de este dominio en la regulación génica.
Principales métodos:
- Construyendo proteínas de fusión que enlazan v-myb con el dominio de unión al ADN GAL4.
- Evaluación de la activación transcripcional utilizando genes reporteros con sitios de unión GAL4 o myb.
- La introducción de eliminaciones en el dominio del activador v-myb.
Principales resultados:
- Se identificó un dominio específico (residuos 204-254) dentro de v-myb como necesario y suficiente para la activación transcripcional.
- Las proteínas de fusión activaron la transcripción de los sitios de unión de GAL4.
- Las proteínas intactas v-myb y c-myb activaron la transcripción a través de los sitios de unión de myb.
- La eliminación del dominio activador abolió la estimulación transcripcional.
Conclusiones:
- El oncogén v-myb posee un dominio de activador transcripcional distinto.
- Este dominio es crucial para la función del oncogén en la regulación de la expresión génica.
- La comprensión de este dominio avanza el conocimiento del crecimiento y la diferenciación celular impulsados por oncogenes.
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