Abstract
DNA assembly is a pivotal technique in synthetic biology. Here, we report a scarless and sequence-independent DNA assembly method using thermal exonucleases (Taq and Pfu DNA polymerases) and Taq DNA ligase (DATEL). Under the optimized conditions, DATEL allows rapid assembly of 2-10 DNA fragments (1-2 h) with high accuracy (between 74 and 100%). Owing to the simple operation system with denaturation-annealing-cleavage-ligation temperature cycles in one tube, DATEL is expected to be a desirable choice for both manual and automated high-throughput assembly of DNA fragments, which will greatly facilitate the rapid progress of synthetic biology and metabolic engineering.
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