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Intersectin 2, a new multimodular protein involved in clathrin-mediated endocytosis.
Intersectin 1 (ITSN1) is a binding partner of dynamin that has been shown to participate in clathrin-mediated endocytosis. Here we report the characterization of a new human gene, ITSN2, highly similar to ITSN1. Alternative splicing of ITSN2 generates a short isoform with two EH domains, a coiled-coil region and five SH3 domains, and a longer isoform containing extra carboxy domains (DH, PH and C2 domains), suggesting that it could act as a guanine nucleotide exchange factor for Rho-like GTPases. ITSN2 expression analysis indicates that it is widely expressed in human tissues. Intersectin 2 isoforms show a subcellular distribution similar to other components of the endocytic machinery and co-localize with Eps15. Moreover, their overexpression, as well as the corresponding ITSN1 protein forms, inhibits transferrin internalization.[1]References
- Intersectin 2, a new multimodular protein involved in clathrin-mediated endocytosis. Pucharcos, C., Estivill, X., de la Luna, S. FEBS Lett. (2000) [Pubmed]
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