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The Rim101 pathway contributes to ER stress adaptation through sensing the state of plasma membrane

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タイトル: The Rim101 pathway contributes to ER stress adaptation through sensing the state of plasma membrane
著者: Obara, Keisuke 著作を一覧する
Kihara, Akio 著作を一覧する
キーワード: ER stress
plasma membrane
contact site
lipid asymmetry
Rim101 pathway
Saccharomyces cerevisiae
発行日: 2017年 1月 1日
出版者: Portland Press Ltd
誌名: Biochemical journal
巻: 474
開始ページ: 51
終了ページ: 63
出版社 DOI: 10.1042/BCJ20160580
抄録: Yeast cells sense alterations in the plasma membrane (PM) lipid asymmetry and external alkalization by the sensor protein Rim21, which functions in the Rim101 pathway. Rim101 signaling is initiated at the PM by the recruitment of the Rim101 signaling complex. The PM physically associates with the cortical endoplasmic reticulum (ER) to form ER-PM contact sites, where several signaling events, lipid exchange, and ion transport take place. In the present study, we investigated the spatial relationship between ER-PM contact sites and the sites of Rim101 signaling. Rim101 signaling mostly proceeds outside ER-PM contact sites in the PM and did not require intact ER-PM contact for its activation. Rather, the Rim101 pathway was constitutively activated by ER-PM contact site disruption, which is known to cause ER stress. ER stress induced by tunicamycin treatment activated the Rim101 pathway. Furthermore, the sensitivity of cells to tunicamycin without ER-PM contact was considerably elevated by the deletion of RIM21. These results suggest that the Rim101 pathway is important for the adaptation to ER stress by compensating for alterations in PM lipid asymmetry induced by ER stress.
Relation (URI):
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 木原 章雄


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