Analysis of interactions between SNARE proteins using imaging ellipsometer coupled with microfluidic array.

Analysis of interactions between SNARE proteins using imaging ellipsometer coupled with microfluidic array.
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使用成像椭圆计与微流体阵列结合分析 SNARE 蛋白之间的相互作用

DOI:
10.1038/srep05341
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发表时间:
2014-06-18
期刊:
影响因子:
4.6
通讯作者:
Jiang T
Jiang T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Qi C;Zhang H;Liu L;Yang R;Kang T;Hao W;Jin G;Jiang T

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可溶性N-乙基马来酰亚胺敏感因子附着受体(SNARE)蛋白是小而丰富的膜结合蛋白,其特异性相互作用在细胞融合或细胞运输期间介导膜融合。在这项研究中,我们报告了使用一种无标记的方法,称为成像椭偏仪来分析三个SNARE,即Sec 22 p,Ykt 6p和Sso 2 p之间的相互作用。将SNARE固定在硅片上,然后用微流控阵列以成对模式分析,使我们发现Ykt 6p和Sso 2 p,Sec 22 p和Sso 2 p之间的相互作用。此外,通过使用成像椭圆偏振仪的实时功能,我们能够获得它们的缔合常数(KA)约为104 M −1。我们认为,使用成像椭偏仪耦合微流控装置将加深我们对膜融合过程的分子机制的理解。
The soluble N-ethylmaleimide-sensitive factor attachment receptor (SNARE) proteins are small and abundant membrane-bound proteins, whose specific interactions mediate membrane fusion during cell fusion or cellular trafficking. In this study, we report the use of a label-free method, called imaging ellipsometer to analyze the interactions among three SNAREs, namely Sec22p, Ykt6p and Sso2p. The SNAREs were immobilized on the silicon wafer and then analyzed in a pairwise mode with microfluidic array, leading us to discover the interactions between Ykt6p and Sso2p, Sec22p and Sso2p. Moreover, by using the real-time function of the imaging ellipsometer, we were able to obtain their association constants (KA) of about 104M−1. We argue that the use of imaging ellipsometer coupled with microfluidic device will deepen our understanding of the molecular mechanisms underlying membrane fusion process.
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