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Microscopy of Fission Yeast Sexual Lifecycle
Published on: March 9, 2016
Una nueva proteína potencial de motor mitótico codificada por el gen cut7+ de la levadura de fisión
1Department of Biophysics, Faculty of Science, Kyoto University, Japan.
Nature
|October 11, 1990
Resumen
Los investigadores identificaron el gen cut7+ en la levadura de fisión, crucial para la formación de huso durante la división celular. Este gen codifica una potencial proteína del motor del huso, ofreciendo nuevos conocimientos sobre la regulación del ciclo celular y la evolución de la quinesina.
Área de la Ciencia:
- Biología celular Biología celular.
- Genética molecular La genética molecular.
Sus antecedentes:
- El cuerpo del polo del eje de la levadura de fisión se duplica durante la transición de fase G2 a M.
- Esta duplicación es esencial para la siembra de microtúbulos y la formación del huso mitótico.
Objetivo del estudio:
- Identificar los genes esenciales para la formación de husos en la levadura de fisión.
- Caracteriza la función y la relación evolutiva del gen cut7+ identificado.
Principales métodos:
- Cribado genético para identificar mutaciones que bloquean la formación del huso.
- Análisis de secuencia del gen cut7+ y comparación con proteínas motoras conocidas.
Principales resultados:
- Se identificaron dos loci que bloquean la formación del husillo cuando mutan.
- El producto del gen cut7+ muestra homología con la cinesin de cadena pesada, lo que sugiere que se trata de un motor de huso.
- cut7+ comparte características con Aspergillus nidulans bimC pero difiere en las secuencias carboxiterminales.
Conclusiones:
- cut7+ es una nueva quinesina mitótica o un miembro de un subgrupo relacionado con bimC.
- Los hallazgos contribuyen a comprender la regulación del ciclo celular y la evolución de la quinesina en los eucariotas.
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