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Super-resolution Imaging of the Bacterial Division Machinery
Published on: January 21, 2013
La división celular asimétrica en B. subtilis implica un intermediario en forma de espiral de la proteína
Sigal Ben-Yehuda1, Richard Losick
1Department of Molecular and Cellular Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA.
Cell
|May 15, 2002
Resumen
Bacillus subtilis cambia la división celular durante la esporulación utilizando un filamento FtsZ en espiral que mueve el anillo Z citocinético desde el centro de la célula hasta los polos. Este proceso está regulado por el aumento de la transcripción del gen FtsZ y la activación de SpoIIE.
Área de la Ciencia:
- Microbiología Microbiología.
- Biología celular Biología celular.
- Desarrollo bacteriano Desarrollo bacteriano
Sus antecedentes:
- El desarrollo de Bacillus subtilis implica una transición crítica de la división celular medial a la asimétrica durante la esporulación.
- Este interruptor de división está orquestado por la reubicación del anillo citokinético Z, una estructura compuesta principalmente por el homólogo de la tubulina FtsZ.
Objetivo del estudio:
- Investigar el mecanismo subyacente a la reubicación del anillo FtsZ durante la esporulación de Bacillus subtilis.
- Para aclarar el papel de la dinámica FtsZ y las proteínas asociadas en el cambio a la división asimétrica.
Principales métodos:
- Observación microscópica de la localización y la dinámica de FtsZ en Bacillus subtilis.
- Análisis genético de la expresión génica FtsZ y SpoIIE durante la esporulación.
- Investigando el impacto de los cambios en la transcripción génica en la formación de anillos Z.
Principales resultados:
- El anillo Z medial es reemplazado por un nuevo filamento FtsZ en forma de espiral que se alarga a lo largo del eje celular.
- Esta formación de filamento FtsZ se propone para mediar la redistribución de FtsZ a los polos de la célula.
- La regulación específica por esporulación de la transcripción del gen FtsZ y la activación del gen SpoIIE son factores clave para la formación de espirales y el ensamblaje de anillos polares Z.
Conclusiones:
- Un filamento espiral FtsZ dinámico es un intermediario clave en el cambio a la división asimétrica en Bacillus subtilis.
- La regulación de la expresión de FtsZ y SpoIIE es crucial para controlar la localización del anillo Z y el desarrollo bacteriano.
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