Flexible Single‐Chain‐Heteropolymer‐Derived Transmembrane Ion Channels with High K+ Selectivity and Tunable pH‐Gated Characteristics. (12th September 2022)

• Record Type: Journal Article
• Authors: Yan, Tengfei; Liu, Shengda; Li, Cong; Xu, Jiayun; Yu, Shuangjiang; Wang, Tingting; Sun, Hongcheng; Liu, Junqiu
• Is Part Of: Angewandte Chemie. Volume 134:Number 42(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-12
• Subjects: Heteropolymer -- Ion Channel -- K+ Selectivity -- Membrane Anchor -- pH-Gated; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202210214
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: A series of single‐chain random heteropolymer (RHP)‐derived artificial ion channels with both high K + selectivity and controllable pH‐gated behaviors were fabricated by a facile "one‐pot" polymerization method. The benzo‐18‐crown‐6 moieties appended on lateral chains of RHPs can form ion‐permeable nanopores and transport K + over Na + through the lipid bilayers. The ion permeation selectivity was significantly enhanced by incorporating a cholesterol group to serve as a membrane anchor. Interestingly, similar to natural gated protein channels, on–off switchable characteristics were also realized by integrating an additional acid‐sensitive alkylamine group into the RHP‐derived channel. The unique design strategies have endowed the RHP‐derived ion channels with facile synthetic procedures, desirable membrane compatibility, high K + selectivity, and tunable pH‐gated properties. This work provides an entry point for future design of novel functional nanochannels. Abstract : A series of single‐chain random heteropolymer (RHP)‐based artificial transmembrane ion channels were prepared via facile "one‐pot" polymerization. K + could be preferably recognized and transported through the nanopores formed by the aligned crown ethers on RHPs. Through simple modification, the RHP‐derived potassium channels manifested satisfactory membrane compatibility, high K + selectivity, and controllable pH‐gated behaviors.