Characterization of the asialoglycoprotein receptor in a continuous hepatoma line.
نویسندگان
چکیده
منابع مشابه
Two asialoglycoprotein receptor polypeptides in human hepatoma cells.
Two cDNA clones isolated from a HepG2 lambda gt11 library encode the classical asialoglycoprotein receptor, H1, as well as a homologous membrane glycoprotein, H2 (Spiess, M., and Lodish, H.F. (1985) Proc. Natl. Acad. Sci. U.S.A. 82, 6465-6469). To study the relationship of H2 to H1 and its possible role in receptor-mediated endocytosis of desialyated glycoproteins, we generated anti-peptide ant...
متن کاملRegulation by phorbol esters of asialoglycoprotein and transferrin receptor distribution and ligand affinity in a hepatoma cell line.
We have investigated the simultaneous regulation of cell surface distribution and ligand binding of the asialoglycoprotein (ASGP) receptor and the transferrin receptor in a hepatoma cell line by phorbol esters. One hour exposure to phorbol esters causes a redistribution of both receptors to the cell interior as shown by radioligand binding at 4 degrees C and selective immunoprecipitation from t...
متن کاملRapid acidification of endocytic vesicles containing asialoglycoprotein in cells of a human hepatoma line
Acidification of endocytic vesicles has been implicated as a necessary step in various processes including receptor recycling, virus penetration, and the entry of diphtheria toxin into cells. However, there have been few accurate pH measurements in morphologically and biochemically defined endocytic compartments. In this paper, we show that prelysosomal endocytic vesicles in HepG2 human hepatom...
متن کاملRecycling of the asialoglycoprotein receptor and the effect of lysosomotropic amines in hepatoma cells
Receptor-mediated uptake and degradation of 125I-asialoorosomucoid (ASOR) in human hepatoma HepG2 cells is inhibited by the lysosomotropic amines chloroquine and primaquine. In the absence of added ligand at 37 degrees C, these amines induce a rapid (t1/2 5.5-6 min) and reversible loss of cell surface 125I-ASOR binding sites as well as a rapid decrease in 125I-ASOR uptake and degradation. There...
متن کاملAsialoglycoprotein receptor phosphorylation and receptor-mediated endocytosis in hepatoma cells. Effect of phorbol esters.
The asialoglycoprotein (ASGP) receptor on Hep G2 cells undergoes constitutive recycling and ligand endocytosis in the presence of phorbol dibutyrate, at a 50% reduced rate relative to control cells (Fallon, R. J., and Schwartz, A. L. (1986) J. Biol. Chem. 261, 15081-15089). The relevance of receptor phosphorylation to these events was investigated by selective immunoprecipitation of surface rec...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1981
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)52477-2