ダウンロード数: 578
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
pnas.1008076107_suppl_figures.pdf | 1.53 MB | Adobe PDF | 見る/開く | |
pnas.1008076107_Figures.pdf | 7.14 MB | Adobe PDF | 見る/開く | |
pnas.1008076107.pdf | 108.65 kB | Adobe PDF | 見る/開く |
タイトル: | HIV-1 viral infectivity factor interacts with TP53 to induce G2 cell cycle arrest and positively regulate viral replication |
著者: | Izumi, Taisuke Io, Katsuhiro Matsui, Masashi Shirakawa, Kotaro https://orcid.org/0000-0002-7469-1276 (unconfirmed) Shinohara, Masanobu Nagai, Yuya Kawahara, Masahiro Kobayashi, Masayuki Kondoh, Hiroshi Misawa, Naoko Koyanagi, Yoshio https://orcid.org/0000-0002-3007-6642 (unconfirmed) Uchiyama, Takashi Takaori-Kondo, Akifumi |
著者名の別形: | 高折, 晃史 |
キーワード: | AIDS NL4-3 HXB2 APOBEC3G infectivity |
発行日: | 11-Nov-2010 |
出版者: | The National Academy of Sciences |
誌名: | Proceedings of the National Academy of Sciences |
巻: | 107 |
号: | 48 |
開始ページ: | 20798 |
終了ページ: | 20803 |
抄録: | Viral infectivity factor, an accessory protein encoded in the HIV-1 genome, induces G2 cell cycle arrest; however, the biological significance and mechanism(s) remain totally unclear. Here we demonstrate that the TP53 pathway is involved in Vif-mediated G2 cell cycle arrest. Vif enhances the stability and transcriptional activity of TP53 by blocking the MDM2-mediated ubiquitination and nuclear export of TP53. Furthermore, Vif causes G2 cell cycle arrest in a TP53-dependent manner. HXB2 Vif lacks these activities toward TP53 and cannot induce G2 cell cycle arrest. Using mutagenesis, we demonstrate that the critical residues for this function are located in the N-terminal region of Vif. Finally, we construct a mutant NL4-3 virus with an NL4-3/HXB2 chimeric Vif defective for the ability to induce cell cycle arrest and show that the mutant virus replicates less effectively than the wild-type NL4-3 virus in T cells expressing TP53. These data imply that Vif induces G2 cell cycle arrest through functional interaction with the TP53/MDM2 axis and that the G2 cell cycle arrest induced by Vif has a positive effect on HIV-1 replication. This report demonstrates the molecular mechanisms and the biological significance of Vif-mediated G2 cell cycle arrest for HIV-1 infection. |
記述: | HIV-1ウイルスのVif蛋白による新たなHIV-1ウイルス複製制御メカニズムの解明. 京都大学プレスリリース. 2010-11-09. |
著作権等: | ©2010 by the National Academy of Sciences This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/131335 |
DOI(出版社版): | 10.1073/pnas.1008076107 |
PubMed ID: | 21071676 |
関連リンク: | https://www.kyoto-u.ac.jp/static/ja/news_data/h/h1/news6/2010/101109_1.htm |
出現コレクション: | 学術雑誌掲載論文等 |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。