Thermostable virus portal proteins as reprogrammable adapters for solid-state nanopore sensors

Benjamin Cressiot, Sandra J. Greive, Mehrnaz Mojtabavi, Alfred A. Antson () and Meni Wanunu ()
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Benjamin Cressiot: Northeastern University
Sandra J. Greive: University of York
Mehrnaz Mojtabavi: Northeastern University
Alfred A. Antson: University of York
Meni Wanunu: Northeastern University

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Nanopore-based sensors are advancing the sensitivity and selectivity of single-molecule detection in molecular medicine and biotechnology. Current electrical sensing devices are based on either membrane protein pores supported in planar lipid bilayers or solid-state (SS) pores fabricated in thin metallic membranes. While both types of nanosensors have been used in a variety of applications, each has inherent disadvantages that limit its use. Hybrid nanopores, consisting of a protein pore supported within a SS membrane, combine the robust nature of SS membranes with the precise and simple engineering of protein nanopores. We demonstrate here a novel lipid-free hybrid nanopore comprising a natural DNA pore from a thermostable virus, electrokinetically inserted into a larger nanopore supported in a silicon nitride membrane. The hybrid pore is stable and easy to fabricate, and, most importantly, exhibits low peripheral leakage allowing sensing and discrimination among different types of biomolecules.

Date: 2018
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DOI: 10.1038/s41467-018-07116-x

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