a The Key Laboratory of Industrial Biotechnology, Ministry of Education , School of Biotechnology, Jiangnan University , Wuxi , China.
b Synergetic Innovation Center of Food Safety and Nutrition , Jiangnan University, Wuxi, Jiangsu, China Jiangnan University , Wuxi , China.
Bioengineered. 2017 May 4;8(3):296-301. doi: 10.1080/21655979.2017.1308986.
Efficient assembly of multiple DNA fragments is a pivotal technology for synthetic biology. A scarless and sequence-independent DNA assembly method (DATEL) using thermal exonucleases has been developed recently. Here, we present a simplified DATEL (sDATEL) for efficient assembly of unphosphorylated DNA fragments with low cost. The sDATEL method is only dependent on Taq DNA polymerase and Taq DNA ligase. After optimizing the committed parameters of the reaction system such as pH and the concentration of Mg and NAD+, the assembly efficiency was increased by 32-fold. To further improve the assembly capacity, the number of thermal cycles was optimized, resulting in successful assembly 4 unphosphorylated DNA fragments with an accuracy of 75%. sDATEL could be a desirable method for routine manual and automated assembly.
高效组装多个 DNA 片段是合成生物学的关键技术。最近开发了一种使用热核酸外切酶的无疤痕、序列无关的 DNA 组装方法(DATEL)。在这里,我们提出了一种简化的 DATEL(sDATEL)方法,用于高效组装低成本的未磷酸化 DNA 片段。sDATEL 方法仅依赖于 Taq DNA 聚合酶和 Taq DNA 连接酶。优化反应体系的关键参数,如 pH 值和 Mg 和 NAD+的浓度后,组装效率提高了 32 倍。为了进一步提高组装效率,优化了热循环次数,成功组装了 4 个未磷酸化的 DNA 片段,准确率为 75%。sDATEL 可能是一种理想的常规手动和自动化组装方法。