Crossref journal-article
American Society for Cell Biology (ASCB)
Molecular Biology of the Cell (1076)
Abstract

Reports on the ultrastructure of cells as well as biochemical data have, for several years, been indicating a connection between caveolae and the actin cytoskeleton. Here, using a yeast two-hybrid approach, we have identified the F-actin cross-linking protein filamin as a ligand for the caveolae-associated protein caveolin-1. Binding of caveolin-1 to filamin involved the N-terminal region of caveolin-1 and the C terminus of filamin close to the filamin-dimerization domain. In in vitro binding assays, recombinant caveolin-1 bound to both nonmuscle and muscle filamin, indicating that the interaction might not be cell type specific. With the use of confocal microscopy, colocalization of caveolin-1 and filamin was observed in elongated patches at the plasma membrane. Remarkably, when stress fiber formation was induced with Rho-stimulating Escherichia coli cytotoxic necrotizing factor 1, the caveolin-1–positive structures became coaligned with stress fibers, indicating that there was a physical link connecting them. Immunogold double-labeling electron microscopy confirmed that caveolin-1–labeled racemose caveolae clusters were positive for filamin. The actin network, therefore, seems to be directly involved in the spatial organization of caveolin-1–associated membrane domains.

Bibliography

Stahlhut, M., & van Deurs, B. (2000). Identification of Filamin as a Novel Ligand for Caveolin-1: Evidence for the Organization of Caveolin-1–associated Membrane Domains by the Actin Cytoskeleton. Molecular Biology of the Cell, 11(1), 325–337.

Authors 2
  1. Martin Stahlhut (first)
  2. Bo van Deurs (additional)
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Dates
Type When
Created 12 years, 1 month ago (July 2, 2013, 7:39 p.m.)
Deposited 3 years, 5 months ago (Feb. 26, 2022, 9:39 p.m.)
Indexed 1 month, 3 weeks ago (July 2, 2025, 3:10 p.m.)
Issued 25 years, 7 months ago (Jan. 1, 2000)
Published 25 years, 7 months ago (Jan. 1, 2000)
Published Print 25 years, 7 months ago (Jan. 1, 2000)
Funders 0

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@article{Stahlhut_2000, title={Identification of Filamin as a Novel Ligand for Caveolin-1: Evidence for the Organization of Caveolin-1–associated Membrane Domains by the Actin Cytoskeleton}, volume={11}, ISSN={1939-4586}, url={http://dx.doi.org/10.1091/mbc.11.1.325}, DOI={10.1091/mbc.11.1.325}, number={1}, journal={Molecular Biology of the Cell}, publisher={American Society for Cell Biology (ASCB)}, author={Stahlhut, Martin and van Deurs, Bo}, editor={Guidotti, Guido}, year={2000}, month=jan, pages={325–337} }