Cargo recognition during clathrin-mediated endocytosis: a team effort |
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Authors: | Sorkin Alexander |
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Affiliation: | Department of Pharmacology, University of Colorado Health Sciences Center, Denver, Colorado 80262, USA. alexander.sorkin@uchsc.edu |
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Abstract: | Transmembrane proteins destined to endosomes are selectively accumulated in clathrin-coated pits at the plasma membrane and rapidly internalized in clathrin-coated vesicles. The recognition of specific sequence motifs in transmembrane cargo by coated-pit proteins confers specificity on the endocytic process. Interaction of membrane cargo with the clathrin adaptor protein complex AP-2 is the major mechanism of cargo sorting into coated pits in mammalian cells. Recent studies have revealed a variety of alternative mechanisms of cargo recruitment involving additional adaptor proteins. These alternative mechanisms appear to be particularly important during clathrin-mediated endocytosis of signaling receptors. |
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