Biohybrid membrane formation by directed insertion of Aquaporin into a solid-state nanopore

Abstract

Technical challenges in molecule sensing and chemical detection have created an increasing demand for transformative materials with high sensitivity and specificity. Biohybrid nanopores have attracted growing interest as they can ideally combine the durability of solid-state nanopores with the precise structure of biological nanopores. Particular care must be taken to control how biological nanopores adapt to their surroundings once in contact with the solid-state nanopore. Two major challenges are to precisely control this adaptability under dynamic conditions and provide predesigned functionalities that can be manipulated for engineering applications. Here, we report on the computational design of a distinctive class of biohybrid active membrane layer, built from the directed-insertion of aquaporin-incorporated lipid shell in to a silica nanopore. First, we describe in detail the mechanisms at play in the insertion of the biological membrane in to the solid-state nanopore. Then we analyze the structural stability of the system and demonstrate that its water permeability is comparable to the one measured in the biological environment. Finally, we discuss how the technology implemented could be applicable to environmental and biomedical applications, such as water desalination and drug discovery, where targeting and controlled permeation of small molecules must be efficiently addressed.