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Hacer la elección correcta: interacciones cromosómicas de largo alcance en el desarrollo.

James R Broach¹

¹Department of Molecular Biology, Princeton University, Princeton, NJ 08558, USA. jbroach@molbio.princeton.edu

|November 20, 2004

Resumen

Este resumen es generado por máquina.

Schizosaccharomyces pombe cambia los tipos de apareamiento mediante la interacción con los loci silenciosos del ADN. Un complejo de proteínas se extiende a través de los loci de tipo de apareamiento, marcando el donante correcto para el cambio.

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Área de la Ciencia:

Biología Molecular Biología Molecular
Genética La genética.
Biología celular Biología celular.

Sus antecedentes:

Schizosaccharomyces pombe exhibe una capacidad única para cambiar tipos de apareamiento en cada generación.
Este tipo de conmutación de apareamiento implica que el locus expresor interactúa con los loci del donante silencioso.

Objetivo del estudio:

Para aclarar el mecanismo por el cual Schizosaccharomyces pombe selecciona el locus donante silencioso apropiado para el cambio de tipo de apareamiento.
Comprender el papel de los complejos proteicos y la heterocromatina en este proceso de selección.

Principales métodos:

Investigó la interacción entre el locus expresivo de tipo de apareamiento y los loci del donante silencioso.
Analizó el papel de la propagación dependiente del tipo de apareamiento y dependiente de la heterocromatina de los complejos proteicos.

Principales resultados:

Se demostró que un complejo proteico está involucrado en el marcado del locus del donante correcto.
Se demostró que la propagación de este complejo depende del tipo de apareamiento y la heterocromatina.
Este complejo facilita la selección del locus donante adecuado para el cambio de tipo de apareamiento.

Conclusiones:

La selección del locus donante en Schizosaccharomyces pombe está mediada por el tipo de apareamiento y la propagación dependiente de la heterocromatina de un complejo proteico específico.
Este mecanismo asegura el cambio preciso y oportuno del tipo de apareamiento en esta levadura de fisión.