Komada M and Kitamura N (2001) Hrs and hbp: possible regulators of endocytosis and exocytosis. Biochem Biophys Res Commun 281(5):1065-9
Abstract: The molecular mechanisms of endocytosis and exocytosis are not yet fully understood. Hrs and Hbp, two tightly associated proteins in eukaryotic cells, have been implicated in these cellular processes. Hrs is homologous to Vps27p, an endosomal protein required for vacuolar and endocytic trafficking in yeast. Hrs is localized to early endosomes and is required for the normal morphology of early endosomes in mammalian cells. Hrs also associates with proteins implicated in endocytosis and exocytosis such as SNAP-25 and Eps15. Hrs treatment inhibits neurotransmitter release in permeabilized neuronal cells and its overexpression inhibits internalization of transferrin. Overexpression of dominant-negative Hbp mutants inhibits ligand-induced downregulation of growth factor/receptor complexes and immunoglobulin E receptor-triggered degranulation of secretory granules in mast cells. These observations suggest an important role for the Hrs/Hbp protein complex in vesicular trafficking during endocytosis and exocytosis.CI - Copyright 2001 Academic Press.
|Status: Published||Type: Journal Article | Research Support, Non-U.S. Gov't | Review||PubMed ID: 11243842|
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