AI Insight
Researchers developed a method to encapsulate gold nanoparticles (AuNPs) inside DNA origami tubes using curvature-inducing structural modifications that cause a flat rectangular DNA origami scaffold to fold inward around the nanoparticles. This "falafel-style" wrapping approach addresses a key limitation of existing DNA origami barcodes, where surface-bound AuNPs can detach during handling or biological experiments, leading to decoding errors. The resulting structures can be functionalized on their outer surface with aptamers and fluorescent dyes, and are capable of programmable dimerization to further expand multiplexing capacity.
Why it matters
More stable DNA origami barcodes with retained nanoparticles could improve the reliability of multiplexed biomolecular detection assays and super-resolution imaging applications, with potential downstream utility in diagnostics and targeted cellular labeling.
Understand the Science
⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
The ability to encode and reliably read nanoscale information is increasingly important for multiplexed biomolecular detection and super-resolution imaging. DNA origami provides a uniquely programmable platform for arranging structural and functional elements with nanometer precision, enabling the creation of identifiable nanoscale patterns. In this context, DNA origami-based barcodes that incorporate gold nanoparticles (AuNPs) to encode either origami geometry or the identity of specific biological targets within defined nanoparticle patterns have been paired with transmission electron microscopy imaging for decoding. However, surface-bond AuNPs may detach during handling, purification, or biological incubation, leading to misidentification or decoding errors in barcode analysis. Here we report a rational design for the controlled encapsulation of AuNPs within DNA origami tubes to enhance nanoparticle retention and structural integrity. We engineered curvature-inducing modifications in a flat rectangular DNA origami scaffold to promote inward folding and confinement of AuNPs. These barcodes can be further functionalized on the outer surface with bioactive aptamers and/or fluorescence dyes, enabling targeted interactions with cells and optical readout. Programable dimerization further expands multiplexing capacity. This design provides a robust framework for structurally stable origami barcodes and advances the development of high-resolution, multiplexed labeling and diagnostic platforms.
Source: Falafel-Style Wrapping of AuNPs for DNA Origami Barcodes