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In eukaryotes, the cell division cycle is divided into distinct, coordinated cellular processes that include cell growth, DNA replication/chromosome duplication, chromosome distribution to daughter cells, and finally, cell division. The cell cycle is tightly regulated by its regulatory systems as well as extracellular signals that affect cell proliferation.
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La lámina de la envoltura nuclear se despolimeriza de manera reversible durante la mitosis.

L Gerace, G Blobel

    Cell
    |January 1, 1980
    PubMed
    Resumen
    Este resumen es generado por máquina.

    La lámina nuclear se desmonta de manera reversible durante la división celular. Las láminas mitóticas A, B y C se despolimerizan, volviéndose monoméricas y más fosforiladas, lo que sugiere que la fosforilación controla el desmontaje de la lámina.

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    Área de la Ciencia:

    • Biología celular Biología celular.
    • Biología Molecular Biología Molecular
    • La bioquímica es la bioquímica.

    Sus antecedentes:

    • La lámina nuclear, una estructura proteica en la membrana nuclear interna, comprende las láminas A, B y C.
    • Trabajos anteriores mostraron que el desmontaje de la lámina durante la división celular coincide con la reconstrucción de la envoltura nuclear.

    Objetivo del estudio:

    • Para investigar los mecanismos moleculares del desmontaje de la lámina nuclear durante la división celular.
    • Para determinar el estado y las propiedades de las láminas durante la mitosis.

    Principales métodos:

    • Microscopía de inmunofluorescencia por microscopía de inmunofluorescencia.
    • La fraccionamiento celular es la fraccionamiento celular.
    • Los estudios de inmunoprecipitación han sido
    • Análisis de sedimentación del gradiente de sacarosa en el análisis de sedimentación.
    • La inmunoprecipitación cuantitativa es una inmunoprecipitación cuantitativa.

    Principales resultados:

    • Las laminas A y C son solubles y no están asociadas a la membrana durante la mitosis.
    • La lámina mitótica B puede asociarse con fragmentos de membrana.
    • Las tres láminas existen como monómeros durante el desmontaje mitótico.
    • Las láminas mitóticas exhiben una mayor fosforilación y un punto isoeléctrico más ácido.

    Conclusiones:

    • La lámina nuclear sufre una despolimerización reversible durante la división celular.
    • La fosforilación enzimática de las láminas probablemente regula su estado de polimerización y el desmontaje mitótico.