1. Light-dependent inhibition of clathrin-mediated endocytosis in yeast unveils conserved functions of the AP2 complex
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Davia Prischich, Núria Camarero, Javier Encinar del Dedo, Maria Cambra-Pellejà, Judit Prat, Laura Nevola, Andrés Martín-Quirós, Elena Rebollo, Laura Pastor, Ernest Giralt, María Isabel Geli, and Pau Gorostiza
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Biochemistry ,Biological sciences ,Cell biology ,Molecular biology ,Natural sciences ,Science - Abstract
Summary: Clathrin-mediated endocytosis (CME) is an essential cellular process, conserved among eukaryotes. Yeast constitutes a powerful genetic model to dissect the complex endocytic machinery, yet there is a lack of specific pharmacological agents to interfere with CME in these organisms. TL2 is a light-regulated peptide inhibitor targeting the AP2-β-adaptin/β-arrestin interaction and that can photocontrol CME with high spatiotemporal precision in mammalian cells. Here, we study endocytic protein dynamics by live-cell imaging of the fluorescently tagged coat-associated protein Sla1-GFP, demonstrating that TL2 retains its inhibitory activity in S. cerevisiae spheroplasts. This is despite the β-adaptin/β-arrestin interaction not being conserved in yeast. Our data indicate that the AP2 α-adaptin is the functional target of activated TL2. We identified as interacting partners for the α-appendage, the Eps15 and epsin homologues Ede1 and Ent1. This demonstrates that endocytic cargo loading and sensing can be executed by conserved molecular interfaces, regardless of the proteins involved.
- Published
- 2023
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