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La supresión fenotípica de las espirales vacías se evita mediante la cabeza de botón.

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  • 1Max-Planck-Institut für Biophysikalische Chemie, Abt. Molekulare Entwicklungsbiologie, Göttingen, Germany.

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PubMed
Resumen
Este resumen es generado por máquina.

El gen de espirales vacíos (ems) en el desarrollo de la cabeza de Drosophila puede cambiar la identidad del segmento cuando se altera su actividad. Las interacciones con la cabeza de botón (btd) pueden permitir que los ems superen su supresión en la jerarquía del gen HOX.

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Área de la Ciencia:

  • Biología del desarrollo Biología del desarrollo.
  • Genética La genética.
  • Biología Molecular Biología Molecular

Sus antecedentes:

  • Los segmentos anteriores de la cabeza en Drosophila se desarrollan independientemente de los genes de la regla de pares y del grupo HOX.
  • Los genes parecidos a huecos, incluidos el ortodenticulo (otd), las espirales vacías (ems) y la cabeza de botón (btd), regulan la formación de segmentos de cabeza.
  • Las espirales vacías (ems) poseen un homeodomain HOX y pueden conferir identidad de segmento troncal cuando la actividad del gen HOX-cluster está ausente.

Objetivo del estudio:

  • Para investigar el papel de las espirales vacías (ems) y la cabeza de botón (btd) en la identidad del segmento de Drosophila.
  • Para aclarar la interacción entre ems y btd en el contexto de la jerarquía del gen HOX.

Principales métodos:

  • Experimentos de expresión errónea de EMS y BTD en embriones de Drosophila.
  • Estudios de interacción in vitro entre las proteínas EMS y BTD.

Principales resultados:

  • La mala expresión de EMS en la cabeza altera la identidad del segmento de una manera dependiente de btd.
  • La mala expresión de BTD en el tronco induce estructuras dependientes del ems.
  • Las proteínas EMS y BTD interactúan in vitro.

Conclusiones:

  • La interacción entre EMS y BTD puede permitir a los ems escapar de la supresión dentro de la jerarquía del gen HOX.
  • Esta interacción podría facilitar un cambio dominante en la prevalencia homeótica a lo largo del eje anterior-posterior.