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Cation-Transporting Peptides: Scaffolds for Functionalized Pores?

机译:阳离子转运肽:功能性毛孔的支架?

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摘要

Protein pores that selectively transport ions across membranes are among nature's most efficient machines. The selectivity of these pores can be exploited for ion sensing and water purification. Since it is difficult to reconstitute membrane proteins in their active form for practical applications it is desirable to develop robust synthetic compounds that selectively transport ions across cell membranes. One can envision tuning the selectivity of pores by incorporating functional groups inside the pore. Readily accessible octapeptides containing (aminomethyl)benzoic acid and alanine are reported here that preferentially transport cations over halides across the lipid bilayer. Ion transport is hypothesized through pores formed by stable assemblies of the peptides. The aromatic ring(s) appear to be proximal to the pore and could be potentially utilized for functionalizing the pore interior.
机译:选择性地跨膜运输离子的蛋白质孔是自然界最有效的机器之一。这些孔的选择性可用于离子感测和水净化。由于在实际应用中很难以其活性形式重构膜蛋白,因此需要开发能选择性地跨细胞膜转运离子的坚固的合成化合物。可以设想通过在孔内掺入官能团来调节孔的选择性。此处报道了易于获得的包含(氨基甲基)苯甲酸和丙氨酸的八肽,它们优先于卤化物跨脂质双层转运阳离子。假设通过肽的稳定组装形成的孔通过离子运输。芳族环似乎在孔附近,并且可以潜在地用于官能化孔内部。

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