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Review
. 2007;39(10):1765-70.
doi: 10.1016/j.biocel.2006.12.004. Epub 2007 Jan 17.

Epsin: Inducing Membrane Curvature

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Review

Epsin: Inducing Membrane Curvature

Caroline A J Horvath et al. Int J Biochem Cell Biol. .

Abstract

Epsin was originally discovered by virtue of its binding to another accessory protein, Eps15. Members of the epsin family play an important role as accessory proteins in clathrin-mediated endocytosis. Epsin isoforms have been described that differ in intracellular site of action and/or in tissue distribution, although all epsins essentially contribute to membrane deformation. Besides inducing membrane curvature, epsin also plays a key function as adaptor protein, coupling various components of the clathrin-assisted uptake and fulfils an important role in selecting and recognizing cargo. Furthermore, epsin possesses the ability to block vesicle formation during mitosis. To perform all these functions, epsin, apart from interacting with PtdIns(4,5)P2 via its ENTH domain, also engages in several protein interactions with different components of the clathrin-mediated endocytic system. Recently, RNA interference has successfully been exploited to generate a cell line constitutively silencing epsin expression, which can be used to study internalization of multiple ligands.

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