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Nat Cell Biol. 1999 May;1(1):33-9.

Functional partnership between amphiphysin and dynamin in clathrin-mediated endocytosis.

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  • 1Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06510, USA.

Abstract

Amphiphysin, a protein that is highly concentrated in nerve terminals, has been proposed to function as a linker between the clathrin coat and dynamin in the endocytosis of synaptic vesicles. Here, using a cell-free system, we provide direct morphological evidence in support of this hypothesis. Unexpectedly, we also find that amphiphysin-1, like dynamin-1, can transform spherical liposomes into narrow tubules. Moreover, amphiphysin-1 assembles with dynamin-1 into ring-like structures around the tubules and enhances the liposome-fragmenting activity of dynamin-1 in the presence of GTP. These results show that amphiphysin binds lipid bilayers, indicate a potential function for amphiphysin in the changes in bilayer curvature that accompany vesicle budding, and imply a close functional partnership between amphiphysin and dynamin in endocytosis.

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PMID:
10559861
DOI:
10.1038/9004
[PubMed - indexed for MEDLINE]
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