2006年9月22日
Opening of holes in liposomal membranes is induced by proteins possessing the FERM domain.
Journal of molecular biology
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- 巻
- 362
- 号
- 3
- 開始ページ
- 403
- 終了ページ
- 13
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jmb.2006.07.071
The destabilization of vesicles caused by interactions between lipid bilayers and proteins was studied by direct, real-time observation using high-intensity dark-field microscopy. We previously reported that talin, a cytoskeletal submembranous protein, can reversibly open stable large holes in giant liposomes made of neutral and acidic phospholipids. Talin and other proteins belonging to the band 4.1 superfamily have the FERM domain at their N-terminal and interact with lipid membranes via that domain. Here, we observed that band 4.1, ezrin and moesin, members of the band 4.1 superfamily, are also able to open stable holes in liposomes. However, truncation of their C-terminal domains, which can interact with the N-terminal FERM domain, impaired their hole opening activities. Oligomeric states of ezrin affected the capability of the membrane hole formation. Phosphatidylinositol bisphosphate (PIP2), which binds to the FERM domain and disrupts the interaction between the N and C termini of the band 4.1 superfamily, down-regulates their membrane opening activity. These results suggest that the intermolecular interaction plays a key role in the observed membrane hole formation.
- リンク情報
- ID情報
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- DOI : 10.1016/j.jmb.2006.07.071
- ISSN : 0022-2836
- ORCIDのPut Code : 89589397
- PubMed ID : 16934293
- SCOPUS ID : 33748102835