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Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast
Published on: January 26, 2017
El gen HOP1 codifica un componente específico de la meiosis de los cromosomas de levadura
N M Hollingsworth1, L Goetsch, B Byers
1Department of Genetics, University of Washington, Seattle 98195.
Cell
|April 6, 1990
Resumen
El gen HOP1 es crucial para el emparejamiento cromosómico meiotico de la levadura y la formación de complejos sinaptonemales. Su proteína, que contiene un motivo de dedo de zinc, se localiza en los cromosomas meióticos, lo que sugiere un papel en la interacción del ADN durante la sinapsis.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- Biología celular Biología celular.
Sus antecedentes:
- El gen HOP1 en Saccharomyces cerevisiae es esencial para el emparejamiento cromosómico meiotico.
- Los defectos en HOP1 conducen a un fallo en la formación del complejo sinaptonemal y al cruce inadecuado entre los cromosomas durante la meiosis.
Objetivo del estudio:
- Para investigar la regulación transcripcional del gen HOP1 durante la esporulación.
- Para determinar la localización de la proteína HOP1 dentro de los cromosomas meioticos.
- Para aclarar el papel funcional del motivo del dedo de zinc Cys2/Cys2 en la actividad de la proteína HOP1.
Principales métodos:
- Análisis de la transcripción del gen HOP1 durante la esporulación.
- Inmunolocalización de la proteína HOP1 en los cromosomas meioticos.
- Mutagénesis dirigida al sitio del motivo del dedo de zinc dentro del gen HOP1.
Principales resultados:
- La expresión del gen HOP1 está regulada por transcripción durante la esporulación de la levadura.
- La proteína HOP1 está localizada a lo largo de toda la longitud de los cromosomas meioticos.
- Una mutación en el motivo del dedo de zinc Cys2/Cys2 (de Cys a Ser) recapitula el fenotipo hop1.
Conclusiones:
- HOP1 codifica un componente de los cromosomas meióticos, probablemente involucrado en la sinapsis cromosómica.
- El motivo del dedo de zinc sugiere que la proteína HOP1 puede interactuar directamente con el ADN.
- HOP1 es potencialmente un constituyente del complejo sinaptonemal, crucial para la progresión meiótica adecuada.
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