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Miranda directs Prospero to a daughter cell during Drosophila asymmetric divisions

Nature volume 390, pages 625–629 (1997)Cite this article

Abstract

Asymmetric cell division is a general process used in many developmental contexts to create two differently fated cells from a single progenitor cell. Intrinsic mechanisms like the asymmetric transmission of cell-fate determinants during cell division, and extrinsic cell-interaction mechanisms, can mediate asymmetric divisions1,2,3. During embryonic development of the Drosophila central nervous system, neural stem cells called neuroblasts divide asymmetrically to produce another multipotent neuroblast and a ganglion mother cell (GMC) of more restricted developmental potential. Intrinsic mechanisms promote asymmetric division of neuroblasts: for example, the transcription factor Prospero localizes to the basal cell cortex of mitotic neuroblasts and then segregates exclusively into the GMC, which buds off from the basal side of the neuroblast4,5,6. In the GMC, Prospero translocates to the nucleus, where it establishes differential gene expression between sibling cells. Here we report the identification of a gene, miranda, which encodes a new protein that co-localizes with Prospero in mitotic neuroblasts, tethers Prospero to the basal cortex of mitotic neuroblasts, directing Prospero into the GMC, and releases Prospero from the cell cortex within GMCs. miranda thus creates intrinsic differences between sibling cells by mediating the asymmetric segregation of a transcription factor into only one daughter cell during neural stem-cell division.

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Figure 1: Identification of the miranda gene.
Figure 2: Identification of the miranda gene.
Figure 3: Miranda and Prospero localization in neural stem cells.
Figure 4: Prospero localization in embryos mutant for miranda.
Figure 5: Mutations in miranda disrupt both the neuronal and the axonal scaffold.

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Acknowledgements

We thank J.-P. Vincent, B. Condron, W. L. Pak and Bloomington Drosophila Stock Center for flies and reagents, H. Izumi for technical assistance, and A. Fujisawa-Sehera, C. Coutu-Hresko and E. Ward for comments on the manuscript. This work was supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan, and CREST (Core Research for Evolutional Science and Technology) of Japan Science and Technology Corporation to F.M., and an NIH grant to J.B.S., and Howard Hughes Medical Institute, of which C.Q.D. is an Associate Investigator.

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Authors and Affiliations

  1. Department of Molecular Genetics, National Institute of Neuroscience, NCNP, 4-1-1 Ogawahigashi, Kodaira, 187, Tokyo, Japan

    Hiroko Ikeshima-Kataoka, Yo-ichi Nabeshima, Fumio Matsuzaki & Fumio Matsuzaki

  2. Department of Genetics, Washington University School of Medicine, 4566 Scott Avenue, St Louis, 63110, Missouri, USA

    James B. Skeath

  3. Howard Hughes Medical Institute and Department of Cell and Structural Biology, University of Illinois Urbana, 61801, Illinois, USA

    James B. Skeath & Chris Q. Doe

  4. CREST, Japan Science & Technology Corporation,

    Yo-ichi Nabeshima & Fumio Matsuzaki

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  1. Hiroko Ikeshima-Kataoka
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  5. Fumio Matsuzaki
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Correspondence to Fumio Matsuzaki.

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Ikeshima-Kataoka, H., Skeath, J., Nabeshima, Yi. et al. Miranda directs Prospero to a daughter cell during Drosophila asymmetric divisions. Nature 390, 625–629 (1997). https://doi.org/10.1038/37641

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