https://scholars.lib.ntu.edu.tw/handle/123456789/138128
標題: | Enhancement of Transactivation Activity of Rta of Epstein-Barr Virus by RanBPM | 作者: | Chang, Li-Kwan Liu, Shih-Tung Kuo, Chung-Wen Wang, Wen-Hung Chuang, Jian-Ying Bianchi, Elisabetta Hong, Yi-Ren |
關鍵字: | Epstein-Barr virus; RanBPM; Rta | 公開日期: | 2008 | 起(迄)頁: | 231-242 | 來源出版物: | Journal of Molecular Biology | 摘要: | Epstein-Barr virus (EBV) expresses the immediate-early protein Rta to activate the transcription of EBV lytic genes and the lytic cycle. We show that RanBPM acts as a binding partner of Rta in yeast two-hybrid analysis. The binding was confirmed by glutathione-S-transferase pull-down assay. A coimmunoprecipitation experiment and confocal microscopy revealed that RanBPM and Rta interact in vivo and colocalize in the nucleus. The interaction appears to involve the SPRY domain in RanBPM and the region between amino acid residues 416 to 476 in Rta. The interaction promotes the transactivation activity of Rta in activating the transcription of BMLF1 and p21 in transient transfection assays. Additionally, RanBPM interacts with SUMO-E2 (Ubc9) to promote sumoylation of Rta by SUMO-1. This fact explains why the expression of RanBPM enhances the transactivation activity of Rta. Taken together, the present results indicate a new role of RanBPM in regulating a viral protein that is critical to EBV lytic activation. © 2008 Elsevier Ltd. All rights reserved. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/162434 | ISSN: | 00222836 | DOI: | 10.1016/j.jmb.2008.04.011 | SDG/關鍵字: | amino acid; BMLF1 protein; glutathione transferase; protein; protein derivative; protein p21; protein Ubc9; RanBPM protein; Rta protein; virus protein; article; confocal microscopy; enzyme assay; Epstein Barr virus; experiment; immunoprecipitation; in vivo study; lysis; nonhuman; priority journal; protein domain; protein expression; protein interaction; regulatory mechanism; sumoylation; transactivation; transient transfection; two hybrid system; yeast; Human herpesvirus 4 |
顯示於: | 生化科技學系 |
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