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Published online March 24, 2008
doi:10.1083/jcb.200706108
The Journal of Cell Biology, Vol. 180, No. 6, 1191-1204
The Rockefeller University Press, 0021-9525 $30.00
© 2008 Johnson et al.
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Article

 The Drosophila CD2AP/CIN85 orthologue Cindr regulates junctions and cytoskeleton dynamics during tissue patterning

Ruth I. Johnson1, Midori J. Seppa2, and Ross L. Cagan1

1 Department of Developmental and Regenerative Biology, Mount Sinai Medical School, New York, NY 10029
2 Department of Molecular Biology and Pharmacology, Washington University School of Medicine, St. Louis, MO 63110

Correspondence to R. Cagan: Ross.Cagan{at}mssm.edu

Developing tissues require cells to undergo intricate processes to shift into appropriate niches. This requires a functional connection between adhesion-mediating events at the cell surface and a cytoskeletal reorganization to permit directed movement. A small number of proteins are proposed to link these processes. Here, we identify one candidate, Cindr, the sole Drosophila melanogaster member of the CD2AP/CIN85 family (this family has been previously implicated in a variety of processes). Using D. melanogaster retina, we demonstrate that Cindr links cell surface junctions (E-cadherin) and adhesion (Roughest) with multiple components of the actin cytoskeleton. Reducing cindr activity leads to defects in local cell movement and, consequently, tissue patterning and cell death. Cindr activity is required for normal localization of Drosophila E-cadherin and Roughest, and we show additional physical and functional links to multiple components of the actin cytoskeleton, including the actin-capping proteins capping protein alpha and capping protein beta. Together, these data demonstrate that Cindr is involved in dynamic cell rearrangement in an emerging epithelium.

Abbreviations used in this paper: AJ, adherens junction; APF, after puparium formation; Arp, actin-related protein; Chic, Chickadee; Cort, Cortactin; Cpa, capping protein alpha; Cpb, capping protein beta; DE-Cad, Drosophila E-cadherin; GMR, glass multimer reporter; Hbs, Hibris; IPC, interommatidial precursor cell; IR, inverted repeat; OMS, ommatidial mispatterning score; qrt-PCR, quantitative real-time PCR; Rst, Roughest; SCAR, suppressor of cAR; shg, shotgun; TAP, tandem affinity purification; Tsr, Twinstar; WASp, Wiskott-Aldrich syndrome protein.


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