Large-Conductance Transmembrane Porin Made from DNA Origami.

Large-Conductance Transmembrane Porin Made from DNA Origami.
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DOI:
10.1021/acsnano.6b03759
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发表时间:
2016-09-27
期刊:
影响因子:
17.1
通讯作者:
Keyser, Ulrich F.
Keyser, Ulrich F.
中科院分区:
材料科学1区
文献类型:
--
作者:
Gopfrich, Kerstin;Li, Chen-Yu;Ricci, Maria;Bhamidimarri, Satya Prathyusha;Yoo, Jejoong;Gyenes, Bertalan;Ohmann, Alexander;Winterhalter, Mathias;Aksimentiev, Aleksei;Keyser, Ulrich F.

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DNA纳米技术可以创造纳米级的三维结构。在这里,我们使用DNA在脂膜中建立迄今为止最大的合成孔洞,接近核孔洞复合体的尺寸,并将孔洞面积和电导率增加10倍于以前的人工通道。在我们的设计中,19个胆固醇标签将一个百万吨漏斗状的DNA折纸孔蛋白锚定在脂质双层膜上。共聚焦成像和离子电流记录显示,DNA孔蛋白自发插入到脂膜中,创建了一个数十纳米电导的跨膜孔。全原子分子动力学模拟在原子水平上表征了电导机制,并独立地证实了DNA孔蛋白的大离子电导。
DNA nanotechnology allows for the creation of three-dimensional structures at nanometer scale. Here, we use DNA to build the largest synthetic pore in a lipid membrane to date, approaching the dimensions of the nuclear pore complex and increasing the pore-area and the conductance 10-fold compared to previous man-made channels. In our design, 19 cholesterol tags anchor a megadalton funnel-shaped DNA origami porin in a lipid bilayer membrane. Confocal imaging and ionic current recordings reveal spontaneous insertion of the DNA porin into the lipid membrane, creating a transmembrane pore of tens of nanosiemens conductance. All-atom molecular dynamics simulations characterize the conductance mechanism at the atomic level and independently confirm the DNA porins’ large ionic conductance.
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影响因子: 5.5
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