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Intermolecular communication on a liposomal membrane: Enzymatic amplification of a photonic signal with a gemini peptide lipid as a membrane-bound artificial receptor

机译:脂质体膜上的分子间通讯:双子肽脂质作为膜结合的人工受体对光子信号的酶促扩增

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摘要

A supramolecular system that can activate an enzyme through photo-isomerization was constructed by using a liposomal membrane scaffold. The design of the system was inspired by natural signal transduction systems, in which enzymes amplify external signals to control signal transduction pathways. The liposomal membrane, which provided a scaffold for the system, was prepared by self-assembly of a photoresponsive receptor and a cationic synthetic lipid. NADH-dependent L-lactate dehydrogenase, the signal amplifier, was immobilized on the liposomal surface by electrostatic interactions. Recognition of photonic signals by the membrane-bound receptor induced photo-isomerization, which significantly altered the receptor's metal-binding affinity. The response to the photonic signal was transmitted to the enzyme by Cu ~(2+) ions. The enzyme amplified the chemical information through a catalytic reaction to generate the intended output signal.
机译:通过使用脂质体膜支架构建了可以通过光异构化激活酶的超分子系统。该系统的设计受到自然信号转导系统的启发,其中酶放大外部信号以控制信号转导途径。通过自组装光响应受体和阳离子合成脂质来制备脂质体膜,该脂质体膜为该系统提供了支架。 NADH依赖的L-乳酸脱氢酶,信号放大器,通过静电相互作用固定在脂质体表面。膜结合受体对光子信号的识别诱导了光异构化,这大大改变了受体的金属结合亲和力。 Cu〜(2+)离子将对光子信号的响应传递给酶。该酶通过催化反应放大了化学信息,以生成预期的输出信号。

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