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Related Experiment Videos

The hepatic asialoglycoprotein receptor.

A L Schwartz

    CRC Critical Reviews in Biochemistry
    |January 1, 1984
    PubMed
    Summary

    Mammalian liver cells have a specific receptor that recognizes and internalizes galactose-terminal glycoproteins. This receptor-mediated endocytosis process delivers glycoproteins to lysosomes for breakdown and recycles the receptor.

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    Area of Science:

    • Cell Biology
    • Biochemistry
    • Glycobiology

    Background:

    • Mammalian hepatic parenchymal cells possess a unique receptor system.
    • This system is crucial for the recognition and processing of specific glycoproteins.

    Purpose of the Study:

    • To characterize the mammalian hepatic parenchymal cell receptor for asialoglycoproteins.
    • To elucidate the mechanism of receptor-mediated endocytosis and ligand specificity.

    Main Methods:

    • Investigated the binding characteristics of the hepatic cell receptor.
    • Studied the intracellular trafficking and reutilization of the receptor during endocytosis.

    Main Results:

    • The receptor avidly binds galactose- or N-acetyl-galactosamine-terminated glycoproteins.
    • Receptor-mediated endocytosis facilitates lysosomal delivery and subsequent catabolism of ligands.
    • The receptor is a transmembrane glycoprotein, present on the cell surface and intracellular compartments.

    Conclusions:

    • The hepatic cell receptor plays a vital role in glycoprotein clearance.
    • Understanding this receptor mechanism offers insights into cellular transport and metabolism.

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