Drosophila APC2 and Armadillo participate in tethering mitotic spindles to cortical actin.

Journal Article

Proper positioning of mitotic spindles ensures equal allocation of chromosomes to daughter cells. This often involves interactions between spindle and astral microtubules and cortical actin. In yeast and Caenorhabditis elegans, some of the protein machinery that connects spindles and cortex has been identified but, in most animal cells, this process remains mysterious. Here, we report that the tumour suppressor homologue APC2 and its binding partner Armadillo both play roles in spindle anchoring during the syncytial mitoses of early Drosophila embryos. Armadillo, alpha-catenin and APC2 all localize to sites of cortical spindle attachment. APC2-Armadillo complexes often localize with interphase microtubules. Zeste-white 3 kinase, which can phosphorylate Armadillo and APC, is also crucial for spindle positioning and regulates the localization of APC2-Armadillo complexes. Together, these data suggest that APC2, Armadillo and alpha-catenin provide an important link between spindles and cortical actin, and that this link is regulated by Zeste-white 3 kinase.

Full Text

Duke Authors

Cited Authors

  • McCartney, BM; McEwen, DG; Grevengoed, E; Maddox, P; Bejsovec, A; Peifer, M

Published Date

  • October 2001

Published In

Volume / Issue

  • 3 / 10

Start / End Page

  • 933 - 938

PubMed ID

  • 11584277

International Standard Serial Number (ISSN)

  • 1465-7392

Digital Object Identifier (DOI)

  • 10.1038/ncb1001-933

Language

  • eng

Conference Location

  • England