Quantifying the Diffusion of Lipids in the Proximal/Distal Leaflets of a Supported Lipid Bilayer by Two-Dimensional Fluorescence Lifetime Correlation Spectroscopy.

Quantifying the Diffusion of Lipids in the Proximal/Distal Leaflets of a Supported Lipid Bilayer by Two-Dimensional Fluorescence Lifetime Correlation Spectroscopy.
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通过二维荧光寿命相关光谱量化支撑脂质双层的近端/远端小叶中脂质的扩散。

DOI:
10.1021/acs.jpcb.8b08614
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发表时间:
2018
期刊:
The journal of physical chemistry. B
影响因子:
--
通讯作者:
S. Yamaguchi
S. Yamaguchi
中科院分区:
--
文献类型:
--
作者:
T. Otosu;S. Yamaguchi

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支持脂质双分子层(SLB)是一个多功能的平台,用于检查生物膜的动力学特性。然而,前提固体衬底对SLB动力学的影响仍然是非常难以捉摸的。特别是,目前还不清楚SLB中每个小叶的扩散率如何受到SLB-固体底物相互作用的影响。在这项研究中,我们应用二维荧光寿命相关光谱来阐明脂质在SLB近端和远端小叶中的扩散。我们发现荧光脂质在近端小叶中的自相关曲线比远端小叶中的衰减更慢,这意味着近端小叶的弥漫性更小。这一结果表明近端小叶和固体基质之间的相互作用更强。
A supported lipid bilayer (SLB) is a versatile platform for examining the dynamical properties of biomembranes. However, the effect of a prerequisite solid substrate on the dynamics of a SLB remains very elusive. Especially, it is not clarified how the diffusivity of each leaflet in a SLB is affected by the SLB-solid substrate interaction. In this study, we applied two-dimensional fluorescence lifetime correlation spectroscopy to a SLB for elucidating the diffusion of lipids in the proximal and distal leaflets of a SLB. We find that the autocorrelation curve of a fluorescent lipid in the proximal leaflet decays more slowly than that in the distal leaflet, meaning that the proximal leaflet is less diffusive. This result indicates stronger interaction between the proximal leaflet and a solid substrate.
捕获支持的脂质双层中细胞膜的纳米级复杂性。
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发表时间: 2009
影响因子: 3
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