La regulación del ciclo celular de SW15 es necesaria para la transcripción HO específica de la célula madre en levaduras
Video Experimental Relacionado
Updated: Jul 15, 2026
10:44
Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline
Published on: December 7, 2021
Resumen
En la levadura, el factor de transcripción SWI5 determina el cambio de tipo de apareamiento. El ARN SWI5 se produce solo en las células madre después de una fase específica del ciclo celular, lo que garantiza que las células hijas no cambien de tipo de apareamiento.
Área de la Ciencia:
- Biología molecular La biología molecular.
- Biología celular Biología celular.
- Genética La genética.
Sus antecedentes:
- Las levaduras homotálicas haploides exhiben una división celular asimétrica.
- Las células madre transcriben transitoriamente el gen HO durante la fase START, lo que permite el cambio de tipo de apareamiento.
- Las células hijas no transcriben el gen HO, por lo que no cambian los tipos de apareamiento.
Objetivo del estudio:
- Investigar si el factor de transcripción SWI5 es el único determinante de la transcripción del gen HO específico de la célula madre.
- Comprender el papel de SWI5 en la regulación del cambio de tipo de apareamiento en la levadura.
Principales métodos:
- Análisis del ARN SWI5 y la expresión de proteínas durante el ciclo celular de la levadura.
- Manipulación experimental de la transcripción SWI5 para evaluar su impacto en el cambio de tipo de apareamiento.
Principales resultados:
- Los ARN SWI5 se producen de una manera regulada por el ciclo celular, específicamente después de la ventana de transcripción del gen HO.
- La transcripción constitutiva de SWI5 en células hijas conduce a su cambio de tipo de apareamiento.
- La evidencia sugiere que los productos del gen SWI5 se dividen asimétricamente durante la división celular.
Conclusiones:
- SWI5 es un determinante crítico para la transcripción HO específica de la célula madre y el posterior cambio de tipo de apareamiento.
- La regulación del ciclo celular de la producción de SWI5 es esencial para mantener la especificidad del tipo de apareamiento.
- La partición asimétrica de SWI5 durante la división celular probablemente subyace a esta diferencia celular madre-hija.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:28Yeast Signaling
Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
02:11The Cell Cycle Control System
The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
02:11The Cell Cycle Control System
The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
01:28The Cell Cycle Control System
The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
01:17Gene Regulation During Sporulation
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...