Abstract
Detection of single nucleotide polymorphisms (SNPs) is critical for early stage diagnosis. However, available clinical methods for detecting SNPs require strict assay conditions or complicated enzyme reactions. DNA hybridization by Au nanoparticles is a new microscopic method for DNA detection, which offers many advantages over traditional ones. But currently, this method is limitedly used because of low yield of hybridization. Here we report novel strategies which use toehold-mediated strand displacement on DNA origami Chip by employing AuNPs, and we greatly improved the yield of hybridization to 80% from less than 10%. Based on the kinetic characteristic of toehold-mediated strand displacement reaction, DNA strands with unmatched sequences can be easily replaced by fully complementary ones, and the exchange rate depends on the length of the toehold region. Therefore, variation on ssDNA sequence can be differentiated by their different displacement time. With this approach we detect SNPs of age-related macular degeneration on DNA origami chip. This approach offers a new, simple and sensitive way to detect SNP.
Keywords: Age-related macular degeneration (AMD), atomic force microscope (AFM), Au nanoparticle (AuNP), DNA origami chips, single- nucleotide polymorphisms (SNPs).
Graphical Abstract
Call for Papers in Thematic Issues
Advances of Heterocyclic Chemistry with Pesticide Activity
Global food safety and security will continue to be a global concern for the next 50 years and beyond. Plant diseases have had a significant impact on food safety and security throughout the entire food chain, from primary production to consumption. While conventional chemical pesticides have been traditionally used for ...read more
Calculation design of covalent/metal organic framework based catalysts
This research area combines theoretical computation and screening with machine learning for the design of covalent/metal organic framework-based catalysts, bridging the disciplines of organic chemistry, physical chemistry, computational chemistry, materials science, and machine learning. It covers several critical aspects: designing and synthesizing organic catalysts for improved performance, applying computational methods ...read more
Carbohydrates conversion in biofuels and bioproducts
Biomass pretreatment, hydrolysis, and saccharification of carbohydrates, and sugars bioconversion in biofuels and bioproducts within a biorefinery framework. Carbohydrates derived from woody biomass, agricultural wastes, algae, sewage sludge, or any other lignocellulosic feedstock are included in this issue. Simulation, techno-economic analysis, and life cycle analysis of a biorefinery process are ...read more
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
Related Books
Advances in Organic Synthesis
The Synthetic Methods, Structures, and Properties of the Ca-C σ Bond Organocalcium Containing Compounds
Advances in Organic Synthesis
Chemistry of Bipyrazoles: Synthesis and Applications
Advances in Organic Synthesis
Advanced Nanocatalysis for Organic Synthesis and Electroanalysis
Advances in Organic Synthesis
Advances in Organic Synthesis
19