DNA-Origami Line-Actants Control Domain Organization and Fission in Synthetic Membranes

DNA-Origami Line-Actants Control Domain Organization and Fission in Synthetic Membranes
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DNA 折纸线活性剂控制合成膜中的结构域组织和裂变

DOI:
10.1101/2023.01.09.523307
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发表时间:
2023
影响因子:
15
通讯作者:
L. Di Michele
L. Di Michele
中科院分区:
化学1区
文献类型:
--
作者:
Roger Rubio;B. Mognetti;P. Cicuta;L. Di Michele

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细胞可以使用蛋白质机器精确地编程其膜的形状和横向组织。为了复制可比较程度的控制,在这里,我们引入DNA折纸线活性剂(DOLA)作为膜雕刻蛋白质的合成类似物。DOLA被设计为选择性地在相分离的脂质膜中共存结构域之间的线界面处积累,调节结构域聚结的趋势。通过实验和粗粒度模拟,我们证明了DOLA可以可逆地稳定合成巨型脂质体上的Pickering乳液的二维类似物,从而实现膜横向组织的动态编程。DOLA对膜结构的控制延伸到三维形态,如导致囊泡分裂的概念验证合成途径所示。有了DOLA,我们为在合成系统中模拟生物细胞的一些关键膜宿主功能奠定了基础,包括信号传导,运输,传感和分裂。
Cells can precisely program the shape and lateral organisation of their membranes using protein machinery. Aiming to replicate a comparable degree of control, here we introduce DNA-Origami Line-Actants (DOLAs) as synthetic analogues of membrane-sculpting proteins. DOLAs are designed to selectively accumulate at the line-interface between co-existing domains in phase-separated lipid membranes, modulating the tendency of the domains to coalesce. With experiments and coarse-grained simulations, we demonstrate that DOLAs can reversibly stabilise two-dimensional analogues of Pickering emulsions on synthetic giant liposomes, enabling dynamic programming of membrane lateral organisation. The control afforded over membrane structure by DOLAs extends to three-dimensional morphology, as exemplified by a proof-of-concept synthetic pathway leading to vesicle fission. With DOLAs we lay the foundations for mimicking, in synthetic systems, some of the critical membrane-hosted functionalities of biological cells, including signalling, trafficking, sensing, and division.
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