Silver nanoparticles boost DNA assembly efficiency up to fivefold in Japanese study
Researchers in Japan have shown that silver nanoparticles can cut and join DNA strands far more efficiently than traditional enzymes, achieving up to five times higher assembly rates.
Scientists from Nagoya University and Gifu University introduced a silver-nanoparticle based protocol that precisely cleaves chemically modified DNA and generates extended overhangs. By coating the particles with polyethylene glycol, they achieved cleavage rates exceeding 91% at 50 °C within one to two hours and recovered almost all DNA after the reaction. The method produced 8-base and 18-base sticky ends, enabling joining efficiencies of roughly twice and five times, respectively, compared with standard 4-base overhangs.
In a proof-of-concept experiment, the assembled fragment encoding green fluorescent protein was introduced into HeLa cells, which expressed the protein correctly. The researchers suggest the technique could streamline the construction of large DNA constructs for applications such as gene therapy, cancer vaccines, synthetic drugs and engineered crops. Future work will explore simultaneous assembly of multiple fragments to enable genome-scale synthesis.
Why it matters
The breakthrough could simplify creation of large DNA constructs, accelerating development of gene therapies and synthetic biology products.
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