A 59-kilodalton protein associated with progestin, estrogen, androgen, and glucocorticoid receptors
| Autor: | Najib G. Wakim, John L. Duhring, Ping Kaung K. Tai, Kiyohide Nakao, Lee E. Faber, Yoshiaki Maeda |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Male
medicine.medical_specialty medicine.medical_treatment Estrogen receptor Biochemistry Cytosol Receptors Glucocorticoid Glucocorticoid receptor Blood serum Internal medicine Testis medicine Animals Receptor Estrogen receptor beta PELP-1 Chemistry Uterus Antibodies Monoclonal Proteins Molecular Weight Androgen receptor Steroid hormone Endocrinology Liver Receptors Estrogen Receptors Androgen Female Rabbits Receptors Progesterone |
| Zdroj: | Biochemistry. 25:5269-5275 |
| ISSN: | 1520-4995 0006-2960 |
| DOI: | 10.1021/bi00366a043 |
| Popis: | Previous studies of the anti 8.5S progestin receptor monoclonal antibody KN 382/EC1 showed that it was specific for nontransformed progestin receptors. However, with different methods of tissue disruption and the use of protease inhibitors, we found that other nontransformed steroid receptors formed immune complexes with KN 382/EC1. Binding of the antibody to rabbit uterine estrogen, progestin, and androgen and liver glucocorticoid receptor systems was characterized by sucrose density gradient centrifugation, high-pressure liquid chromatography (HPLC), immunoadsorption, and immunoblotting. Immobilized KN 382/EC1 adsorbed both Mr 59,000 and Mr 92,000 proteins. The Mr 92,000 protein appeared to be bound to the antigenic Mr 59,000 protein, and the two proteins were present in apparently the same stoichiometric relationship in several tissues. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of immunoadsorbed material revealed appreciable amounts of both proteins in testis, stomach, lung, liver, uterus, and kidney. Only trace amounts were found in skeletal or heart muscle, and none was found in blood serum. Cleveland digestion of isolated Mr 59,000 and 92,000 proteins revealed dissimilar peptide constituents. Immunoblots of material from uterus and liver resulted in staining of the Mr 59,000 protein but not the Mr 92,000 protein. We conclude that similar antigenic determinants reside in components of several nontransformed steroid receptors and they reside on an Mr 59,000 protein. It is likely, therefore, that there are common components present in nontransformed steroid receptors. |
| Databáze: | OpenAIRE |
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