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Molecular Evolution of the Tre Recombinase
Published on: May 29, 2008
TREX es una transcripción de acoplamiento complejo conservado con exportación de ARN mensajero
Katja Strässer1, Seiji Masuda, Paul Mason
1BZH, University of Heidelberg, Im Neuenheimer Feld 328, D-69120 Heidelberg, Germany.
Nature
|April 30, 2002
Resumen
El complejo TREX, que comprende las proteínas de levadura Yra1 y Sub2 y sus contrapartes metazoares Aly y UAP56, vincula la transcripción y la exportación de ARNm. Este complejo conservado se recluta a los genes activados durante la transcripción.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
- Genética La genética.
Sus antecedentes:
- La exportación y el empalme del ARN mensajero (ARNm) son procesos celulares cruciales.
- Las proteínas de levadura Yra1 y Sub2 son factores clave de exportación de ARNm con los homólogos de metazoos conservados Aly y UAP56.
- Estos factores conectan las maquinarias de empalme y exportación de ARNm.
Objetivo del estudio:
- Investigar la asociación de Yra1 y Sub2 con el complejo THO.
- Para definir un complejo conservado que vincula la transcripción y la exportación de ARNm.
- Para aclarar el papel de este complejo en la expresión génica.
Principales métodos:
- Análisis bioquímicos para determinar las asociaciones de proteínas.
- Estudios de interacción genética.
- Análisis de la exportación de ARN en sistemas de levaduras y metazoos.
Principales resultados:
- Yra1 y Sub2 se asocian estequiométricamente con el complejo THO de la levadura.
- Las interacciones genéticas confirman el vínculo funcional entre los componentes Yra1, Sub2 y THO.
- Aly y UAP56 se asocian con las contrapartes humanas del complejo THO.
- El complejo TREX conservado se recluta a los genes activados y viaja con la ARN polimerasa II.
Conclusiones:
- Se define un complejo TREX (transcripción/exportación) conservado, que comprende los componentes del complejo Yra1/Aly, Sub2/UAP56 y THO.
- El complejo TREX juega un papel conservado en el acoplamiento de la transcripción a la exportación de ARNm.
- Este complejo es reclutado para los genes transcritos activamente y se mueve con la ARN polimerasa II.
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