Caenorhabditis elegans Aurora A kinase is required for the formation of spindle microtubules in female meiosis

Eisuke Sumiyoshi, Yuma Fukata, Satoshi Namai, Asako Sugimoto

    研究成果: Article査読

    10 被引用数 (Scopus)

    抄録

    In many animals, female meiotic spindles are assembled in the absence of centrosomes, the major microtubule (MT)-organizing centers. How MTs are formed and organized into meiotic spindles is poorly understood. Here we report that, in Caenorhabditis elegans, Aurora A kinase/AIR-1 is required for the formation of spindle microtubules during female meiosis. When AIR-1 was depleted or its kinase activity was inhibited in C. elegans oocytes, although MTs were formed around chromosomes at germinal vesicle breakdown (GVBD), they were decreased during meiotic prometaphase and failed to form a bipolar spindle, and chromosomes were not separated into two masses. Whereas AIR-1 protein was detected on and around meiotic spindles, its kinase-active form was concentrated on chromosomes at prometaphase and on interchromosomal MTs during late anaphase and telophase. We also found that AIR-1 is involved in the assembly of short, dynamic MTs in the meiotic cytoplasm, and these short MTs were actively incorporated into meiotic spindles. Collectively our results suggest that, after GVBD, the kinase activity of AIR-1 is continuously required for the assembly and/or stabilization of female meiotic spindle MTs.

    本文言語English
    ページ(範囲)4187-4196
    ページ数10
    ジャーナルMolecular biology of the cell
    26
    23
    DOI
    出版ステータスPublished - 2015 11 15

    ASJC Scopus subject areas

    • Molecular Biology
    • Cell Biology

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