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Choudhary A, Maffeo C, Aksimentiev A. Multi-resolution simulation of DNA transport through large synthetic nanostructures. Phys Chem Chem Phys 2022; 24:2706-2716. [PMID: 35050282 PMCID: PMC8855663 DOI: 10.1039/d1cp04589j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Modeling and simulation has become an invaluable partner in development of nanopore sensing systems. The key advantage of the nanopore sensing method - the ability to rapidly detect individual biomolecules as a transient reduction of the ionic current flowing through the nanopore - is also its key deficiency, as the current signal itself rarely provides direct information about the chemical structure of the biomolecule. Complementing experimental calibration of the nanopore sensor readout, coarse-grained and all-atom molecular dynamics simulations have been used extensively to characterize the nanopore translocation process and to connect the microscopic events taking place inside the nanopore to the experimentally measured ionic current blockades. Traditional coarse-grained simulations, however, lack the precision needed to predict ionic current blockades with atomic resolution whereas traditional all-atom simulations are limited by the length and time scales amenable to the method. Here, we describe a multi-resolution framework for modeling electric field-driven passage of DNA molecules and nanostructures through to-scale models of synthetic nanopore systems. We illustrate the method by simulating translocation of double-stranded DNA through a solid-state nanopore and a micron-scale slit, capture and translocation of single-stranded DNA in a double nanopore system, and modeling ionic current readout from a DNA origami nanostructure passage through a nanocapillary. We expect our multi-resolution simulation framework to aid development of the nanopore field by providing accurate, to-scale modeling capability to research laboratories that do not have access to leadership supercomputer facilities.
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Affiliation(s)
- Adnan Choudhary
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Christopher Maffeo
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Aleksei Aksimentiev
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Wells CC, Melnikov DV, Cirillo JT, Gracheva ME. Multiscale simulations of charge and size separation of nanoparticles with a solid-state nanoporous membrane. Phys Rev E 2020; 102:063104. [PMID: 33465955 DOI: 10.1103/physreve.102.063104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 11/19/2020] [Indexed: 11/07/2022]
Abstract
Nanoporous membranes provide an attractive approach for rapid filtering of nanoparticles at high-throughput volume, a goal useful to many fields of science and technology. Creating a device to readily separate different particles would require an extensive knowledge of particle-nanopore interactions and particle translocation dynamics. To this end, we use a multiscale model for the separation of nanoparticles by combining microscopic Brownian dynamics simulations to simulate the motion of spherical nanoparticles of various sizes and charges in a system with nanopores in an electrically biased membrane with a macroscopic filtration model accounting for bulk diffusion of nanoparticles and membrane surface pore density. We find that, in general, the separation of differently sized particles is easier to accomplish than of differently charged particles. The separation by charge can be better performed in systems with low pore density and/or smaller filtration chambers when electric nanopore-particle interactions are significant. The results from these simple cases can be used to gain insight in the more complex dynamics of separating, for example, globular proteins.
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Affiliation(s)
- Craig C Wells
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
| | - Dmitriy V Melnikov
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
| | - Joshua T Cirillo
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
| | - Maria E Gracheva
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
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The Influence of Electric Field Intensity and Particle Length on the Electrokinetic Transport of Cylindrical Particles Passing through Nanopore. MICROMACHINES 2020; 11:mi11080722. [PMID: 32722448 PMCID: PMC7463976 DOI: 10.3390/mi11080722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/22/2020] [Accepted: 07/22/2020] [Indexed: 01/08/2023]
Abstract
The electric transport of nanoparticles passing through nanopores leads to a change in the ion current, which is essential for the detection technology of DNA sequencing and protein determination. In order to further illustrate the electrokinetic transport mechanism of particles passing through nanopores, a fully coupled continuum model is constructed by using the arbitrary Lagrangian–Eulerian (ALE) method. The model consists of the electric field described by the Poisson equation, the concentration field described by Nernst–Planck equation, and the flow field described by the Navier–Stokes equation. Based on this model, the influence of imposed electric field and particle length on the electrokinetic transport of cylindrical particles is investigated. It is found firstly the translation velocities for the longer particles remain constant when they locate inside the nanopore. Both the ion current blockade effect and the ion current enhancement effect occur when cylindrical particles enter and exit the nanopore, respectively, for the experimental parameters employed in this research. Moreover, the particle translation velocity and current fluctuation amplitude are dominated by the electric field intensity, which can be used to adjust the particle transmission efficiency and the ion current detectability. In addition, the increase in particle length changes the particle position corresponding to the peak value of the ion current, which contributes to distinguishing particles with different lengths as well.
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Ding T, Yang J, Pan V, Zhao N, Lu Z, Ke Y, Zhang C. DNA nanotechnology assisted nanopore-based analysis. Nucleic Acids Res 2020; 48:2791-2806. [PMID: 32083656 PMCID: PMC7102975 DOI: 10.1093/nar/gkaa095] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 01/29/2020] [Accepted: 02/17/2020] [Indexed: 12/30/2022] Open
Abstract
Nanopore technology is a promising label-free detection method. However, challenges exist for its further application in sequencing, clinical diagnostics and ultra-sensitive single molecule detection. The development of DNA nanotechnology nonetheless provides possible solutions to current obstacles hindering nanopore sensing technologies. In this review, we summarize recent relevant research contributing to efforts for developing nanopore methods associated with DNA nanotechnology. For example, DNA carriers can capture specific targets at pre-designed sites and escort them from nanopores at suitable speeds, thereby greatly enhancing capability and resolution for the detection of specific target molecules. In addition, DNA origami structures can be constructed to fulfill various design specifications and one-pot assembly reactions, thus serving as functional nanopores. Moreover, based on DNA strand displacement, nanopores can also be utilized to characterize the outputs of DNA computing and to develop programmable smart diagnostic nanodevices. In summary, DNA assembly-based nanopore research can pave the way for the realization of impactful biological detection and diagnostic platforms via single-biomolecule analysis.
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Affiliation(s)
- Taoli Ding
- Department of Computer Science and Technology, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Department of Biomedical Engineering, College of engineering, Peking University, Beijing 100871, China
| | - Jing Yang
- School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China
| | - Victor Pan
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Emory University School of Medicine, Atlanta, GA 30322, USA
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - Nan Zhao
- School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China
| | - Zuhong Lu
- Department of Biomedical Engineering, College of engineering, Peking University, Beijing 100871, China
| | - Yonggang Ke
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Emory University School of Medicine, Atlanta, GA 30322, USA
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - Cheng Zhang
- Department of Computer Science and Technology, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
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