Expression of functional growth hormone receptor in a mouse L cell line infected with recombinant vaccinia virus
| Autor: | G. J. A. M. Strous, J W Slot, C. Verheijen, P van Kerkhof, Alan L. Schwartz, John W. A. Rossen, Corne A. M. Roelen, Willisa Liou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1994 |
| Předmět: |
Growth-hormone-releasing hormone receptor
DNA Recombinant L Cells (Cell Line) Gene Expression Somatotropin Vaccinia virus Growth hormone receptor Biology Transfection Mice L Cells Cytosol Genetic Thyrotropin-releasing hormone receptor Receptors Animals Antigens Microscopy Immunoelectron Insulin-like growth factor 1 receptor Hormone response element Recombination Genetic Immunoelectron Microscopy Thyroid hormone receptor Recombinant Cell Biology Receptors Somatotropin DNA Molecular biology Recombination Hormone receptor Growth Hormone Rabbits Growth hormone receptor binding |
| Zdroj: | Experimental Cell Research, 211(2), 353-9. HANLEY & BELFUS-ELSEVIER INC |
| ISSN: | 0014-4827 |
| Popis: | The growth hormone receptor is a member of a large family of receptors including the receptors for prolactin and interleukins. Upon binding to one molecule of growth hormone two growth hormone receptor polypeptides dimerize. We have expressed the rabbit growth hormone receptor DNA in transfected mouse L cells infected with polymerase T7-producing vaccinia virus. The growth hormone receptor was synthesized as a 85-kDa protein and transported to the cell surface. Western blotting and metabolic labeling combined with immunoprecipitation using a rabbit antibody probably directed against the cytosolic domain of the receptor showed that its expression was dependent on both transfection of the growth hormone receptor DNA and vaccinia infection. Binding studies with 125I-labeled growth hormone demonstrated specific binding sites at the cell surface 20 h after transfection. Permeabilization with saponin showed that the growth hormone receptor binding sites were almost exclusively present at the cell surface with little intracellularly. Chemical crosslinking of the 125I-growth hormone complex resulted in a 180-kDa complex which could specifically be immunoprecipitated with the antiserum. Electron microscopic immunocytochemistry confirmed the presence of growth hormone receptor at the cell surface. Furthermore, specific growth hormone receptor antigen was also associated with intracellular membranes. These results thus show that this transient transfection system will be useful for cell biological studies of growth hormone receptor regulation. |
| Databáze: | OpenAIRE |
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