ジャーナル: Cell / 年: 2012 タイトル: Structural basis of membrane bending by the N-BAR protein endophilin. 著者: Carsten Mim / Haosheng Cui / Joseph A Gawronski-Salerno / Adam Frost / Edward Lyman / Gregory A Voth / Vinzenz M Unger / 要旨: Functioning as key players in cellular regulation of membrane curvature, BAR domain proteins bend bilayers and recruit interaction partners through poorly understood mechanisms. Using electron ...Functioning as key players in cellular regulation of membrane curvature, BAR domain proteins bend bilayers and recruit interaction partners through poorly understood mechanisms. Using electron cryomicroscopy, we present reconstructions of full-length endophilin and its N-terminal N-BAR domain in their membrane-bound state. Endophilin lattices expose large areas of membrane surface and are held together by promiscuous interactions between endophilin's amphipathic N-terminal helices. Coarse-grained molecular dynamics simulations reveal that endophilin lattices are highly dynamic and that the N-terminal helices are required for formation of a stable and regular scaffold. Furthermore, endophilin accommodates different curvatures through a quantized addition or removal of endophilin dimers, which in some cases causes dimerization of endophilin's SH3 domains, suggesting that the spatial presentation of SH3 domains, rather than affinity, governs the recruitment of downstream interaction partners.
全体 : Endophilin N-BAR domain (1-247) bound to lipid bilayer
全体
名称: Endophilin N-BAR domain (1-247) bound to lipid bilayer
要素
試料: Endophilin N-BAR domain (1-247) bound to lipid bilayer
タンパク質・ペプチド: endophilin-A1 N-BAR domain
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超分子 #1000: Endophilin N-BAR domain (1-247) bound to lipid bilayer
超分子
名称: Endophilin N-BAR domain (1-247) bound to lipid bilayer タイプ: sample / ID: 1000 集合状態: Dimer of the N-BAR domain of endophilin binds to bilayer Number unique components: 1