2021
DOI: 10.1039/d0nr08729g
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The structure and unzipping behavior of dumbbell and hairpin DNA revealed by real-time nanopore sensing

Abstract: Hairpin structures play an essential role in replication, transcription and recombination. Single molecule studies enable real-time measurement and observation of energetics and dynamics of hairpin structures, including folding and DNA-protein...

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Cited by 11 publications
(13 citation statements)
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“…Similar current fluctuations with both upward and downward spikes have been reported for hairpin DNA molecules trapped inside a biological nanopore. 34,35 In our nanocavity device, the trapped DNA can be formed either by DNA compaction into a globule shape 36 or by multiple DNA strands residing in the Si pore constriction at the same time. 37,38 The dominating DNA trapping mechanism in our nanocavity will be discussed later.…”
Section: Resultsmentioning
confidence: 99%
“…Similar current fluctuations with both upward and downward spikes have been reported for hairpin DNA molecules trapped inside a biological nanopore. 34,35 In our nanocavity device, the trapped DNA can be formed either by DNA compaction into a globule shape 36 or by multiple DNA strands residing in the Si pore constriction at the same time. 37,38 The dominating DNA trapping mechanism in our nanocavity will be discussed later.…”
Section: Resultsmentioning
confidence: 99%
“…29,62 MspA remains stable under extreme pH value of 2-14 and high temperature up to 92 C. 63 It has a conical shape with a constriction region of 1.2 nm wide and 0.6 nm length, which makes MspA a superior candidate for DNA sensing and sequencing. 11,14,40,64 However, the constriction region of wild-type MspA is highly negative charged, preventing ssDNA from being translocated and detected. Then, Butler et al 40 65 Mucin 1 protein, 66 and rapid assay for carbapenemresistant Klebsiella pneumoniae.…”
Section: Mycobacterium Smegmatis Porin Amentioning
confidence: 99%
“…For example, Li et al developed a nanopore sensing based on the interaction of hairpin DNA and dumbbell DNA with pore proteins, demonstrating the potential application of dumbbell DNA in clinical diagnostics. 22 Mathilde et al developed an antibody-free assay platform for thrombin detection using dumbbell-shaped DNA and loop-mediated isothermal amplification (LAMP). 23 nucleic acid signal amplification technology has recently attracted great attention for the early diagnosis of AD.…”
Section: Introductionmentioning
confidence: 99%
“…More recently, signal amplification sensors based on DNA aptamers , and dumbbell-shaped DNA structures were regarded as appealing analytical platforms for the detection of trace amounts of biomolecules. For example, Li et al developed a nanopore sensing based on the interaction of hairpin DNA and dumbbell DNA with pore proteins, demonstrating the potential application of dumbbell DNA in clinical diagnostics . Mathilde et al developed an antibody-free assay platform for thrombin detection using dumbbell-shaped DNA and loop-mediated isothermal amplification (LAMP) .…”
Section: Introductionmentioning
confidence: 99%