Retinol-induced changes in the phosphorylation levels of histones and high mobility group proteins from Sertoli cells
| Autor: | José Cláudio Fonseca Moreira, Nede Carlos Ribeiro, A. B. Rocha, Elena Aida Bernard, C.J.S. Ferreira, Felipe Dal-Pizzol, Fábio Klamt |
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| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
Male
Vitamina A Physiology Sertoli cells Immunology Biophysics Biochemistry chemistry.chemical_compound histones medicine Animals Rats Wistar General Pharmacology Toxicology and Pharmaceutics Nuclear protein Vitamin A lcsh:QH301-705.5 lcsh:R5-920 biology phosphorylation General Neuroscience Coomassie Brilliant Blue Cell Biology General Medicine Sertoli cell Molecular biology Rats Chromatin Histone High-mobility group medicine.anatomical_structure chemistry lcsh:Biology (General) Célula de sertoli biology.protein Phosphorylation high mobility group proteins lcsh:Medicine (General) DNA retinol |
| Zdroj: | Brazilian Journal of Medical and Biological Research, Vol 33, Iss 3, Pp 287-293 (2000) Brazilian Journal of Medical and Biological Research v.33 n.3 2000 Brazilian Journal of Medical and Biological Research Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Brazilian Journal of Medical and Biological Research, Volume: 33, Issue: 3, Pages: 287-293, Published: MAR 2000 |
| Popis: | Chromatin proteins play a role in the organization and functions of DNA. Covalent modifications of nuclear proteins modulate their interactions with DNA sequences and are probably one of the multiple factors involved in the process of switch on/off transcriptionally active regions of DNA. Histones and high mobility group proteins (HMG) are subject to many covalent modifications that may modulate their capacity to bind to DNA. We investigated the changes induced in the phosphorylation pattern of cultured Wistar rat Sertoli cell histones and high mobility group protein subfamilies exposed to 7 microM retinol for up to 48 h. In each experiment, 6 h before the end of the retinol treatment each culture flask received 370 KBq/ml [32P]-phosphate. The histone and HMGs were isolated as previously described [Moreira et al. Medical Science Research (1994) 22: 783-784]. The total protein obtained by either method was quantified and electrophoresed as described by Spiker [Analytical Biochemistry (1980) 108: 263-265]. The gels were stained with Coomassie brilliant blue R-250 and the stained bands were cut and dissolved in 0.5 ml 30% H2O2 at 60oC for 12 h. The vials were chilled and 5.0 ml scintillation liquid was added. The radioactivity in each vial was determined with a liquid scintillation counter. Retinol treatment significantly changed the pattern of each subfamily of histone and high mobility group proteins. |
| Databáze: | OpenAIRE |
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