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2018 - Hand-held DNA-sequencing and biosensing with nanopores

Icon Orbit   Orbit 16 Oral Presentation

Presenter: 
Prof. Dr. Stefan Howorka, University College London, Department of Chemistry
Source:
Webinar: "Artificial Lipid Bilayers in focus: Hand-held DNA-sequencing and biosensing with nanopores", June 28, 2018

Title:
Hand-held DNA-sequencing and biosensing with nanopores

Abstract:

Portable DNA sequencing and biosensing can advance research, bedside-diagnostics, and homeland security. I describe how label-free sensing is achieved with atom-scale designed membrane nanopores. In this strategy, nanopores act as electronic sensors that detect when individual molecules pass the pores’ nanoscale hole. The temporary blockages cause changes in ionic pore current. The approach has helped pioneer portable DNA sequencing with protein pores(1) to discriminate individual bases. More recently, synthetic pores have been built by folding DNA strands into defined channels(2). The DNA nanopores are relevant as they overcome the narrow size range of protein pores and thereby accommodate folded protein analytes. The DNA nanostructures are also easier to rationally design than proteins(3) and thereby enable new applications, also in synthetic biology(4).

(1) Nature 2014 516 250;
(2) Nat. Nanotechnol. 2016 11 152;
(3) Nat. Nanotechnol. 2017 12 619;
(4) Science 2016 352 890; Nat. Chem. 2017 9 611

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