本課題組長(zhǎng)期從事仿生智能納米通道的制備與應(yīng)用,系統(tǒng)研究了納米通道表界面性質(zhì)如何調(diào)控物質(zhì)輸運(yùn)。一直以來(lái),光調(diào)控與分子識(shí)別都是智能納米通道領(lǐng)域的重要研究?jī)?nèi)容。我們成功構(gòu)建了光調(diào)控的DNA納米通道與基于核酸適配體的離子識(shí)別納米通道,在此基礎(chǔ)上,我們考慮,能否將光調(diào)控與有“化學(xué)抗體”之稱的核酸適配體結(jié)合,實(shí)現(xiàn)光控分子識(shí)別與傳輸?這一課題的產(chǎn)生并非靈光一閃,而是自然的邏輯延續(xù)。為了實(shí)現(xiàn)對(duì)分子識(shí)別功能的調(diào)控,我們聚焦在核酸適配體的結(jié)構(gòu)上,其特殊核苷酸序列中的部分堿基間可通過(guò)氫鍵實(shí)現(xiàn)互補(bǔ)配對(duì),并形成特殊結(jié)構(gòu)而實(shí)現(xiàn)分子識(shí)別。由于氫鍵強(qiáng)度適中,易于形成與破壞,是調(diào)控其結(jié)構(gòu)的合適靶點(diǎn);偶氮苯基團(tuán)的光致異構(gòu)性則可實(shí)現(xiàn)對(duì)互補(bǔ)堿基對(duì)的調(diào)控。因此,我們選用了可識(shí)別ATP分子的核酸適配體,并在其序列中“嵌入”光調(diào)控因子 —“偶氮苯基團(tuán)”,通過(guò)光控偶氮苯異構(gòu)化實(shí)現(xiàn)氫鍵的形成與打開(kāi),從而實(shí)現(xiàn)對(duì)ATP分子的可逆結(jié)合與釋放?;诖?,我們利用光響應(yīng)核酸適配體與納米通道組裝了智能ATP分子輸運(yùn)的納米機(jī)器。在紫外光和可見(jiàn)光的作用下,實(shí)現(xiàn)了ATP分子的有效跨膜輸運(yùn)。該工作將對(duì)設(shè)計(jì)新型分子輸運(yùn)機(jī)器研究具有重要的借鑒與啟發(fā)意義。
This work introduced the control of molecular transport of ATP molecules through polymer nanopores using light-switchable aptamers for ATP. By coupling the well-developed DNA aptamers technique and light-induced isomerization chemistry, the authors established a molecule transport system powered by light. Overall, the transmembrane mass transport by using nanomachines is an ingenious design with well supported data.
中國(guó)科學(xué)院理化技術(shù)研究所
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
中國(guó)科學(xué)院理化技術(shù)研究所
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Light-Driven ATP Transmembrane Transport Controlled by DNA Nanomachines
2018,?Vol.?140,?No.?47,?16048-16052
https://pubs.acs.org/doi/10.1021/jacs.8b10527