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Regulación en serie de los reguladores de la transcripción en el ciclo celular de la levadura

I Simon¹, J Barnett, N Hannett

¹Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA.

|September 27, 2001

Resumen

Los activadores transcripcionales del ciclo celular de la levadura forman una red cíclica, con activadores de una etapa que regulan los de la siguiente. Esto revela un sistema coordinado que controla la expresión génica y los eventos celulares para la progresión del ciclo celular.

Área de la Ciencia:

Biología Molecular Biología Molecular
Genética La genética.
Biología de Sistemas Biología de Sistemas.

Sus antecedentes:

El ciclo celular de la levadura involucra intrincados programas de expresión génica.
Los activadores transcripcionales juegan un papel crucial en la regulación de estos programas.
Comprender la red reguladora es clave para descifrar el control del ciclo celular.

Objetivo del estudio:

Aclarar las funciones reguladoras de nueve conocidos activadores transcripcionales del ciclo celular de levadura.
Trazar un mapa de la red reguladora transcripcional que controla el ciclo celular de la levadura.
Para entender cómo estos activadores coordinan la expresión génica global.

Principales métodos:

Se empleó el análisis de ubicación de todo el genoma.
Investigó las interacciones reguladoras entre los activadores transcripcionales del ciclo celular.

Principales resultados:

Identificó un patrón de regulación en serie donde los activadores de una etapa del ciclo celular regulan los de la siguiente.
Se demostró que estos activadores forman una red reguladora cíclica.
Se demostró la regulación coordinada de la expresión génica global y las funciones específicas de la etapa.

Conclusiones:

Los nueve activadores transcripcionales forman una red reguladora cíclica y conectada.
Esta red impulsa el ciclo continuo de eventos celulares en la levadura.
Proporciona un mapa fundamental para la red reguladora transcripcional del ciclo celular.

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