Send to

Choose Destination
See comment in PubMed Commons below
Mol Cell. 1999 Dec;4(6):883-91.

Modes of protein movement that lead to the asymmetric localization of partner of Numb during Drosophila neuroblast division.

Author information

Howard Hughes Medical Institute, Department of Physiology, University of California, San Francisco 94143, USA.


Partner of Numb (Pon) colocalizes with the determinant Numb and is required for its proper asymmetric localization in Drosophila. How the asymmetric localization of Pon is accomplished is not well understood. Here, we show that Pon localization takes place at the protein level and that its C-terminal region is necessary and sufficient for asymmetric localization. Fusion of the Pon localization domain with green fluorescent protein (GFP) allowed monitoring of the localization process in living embryos. Upon a neuroblast's entry into mitosis, Pon is recruited from the cytoplasm to the cortex. Cortically recruited Pon can move apically or basally within the two-dimensional confines of the cortex. This movement can occur when myosin motor activity is inhibited. However, the restriction of Pon to the basal cortex requires both actomyosin and Inscuteable.

[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center