a simple and accurate two-step long dna sequences synthesis strategy to improve heterologous gene expression in pichia一个简单而准确的两步长的dna序列合成策略来提高外源基因表达在毕赤酵母属.pdfVIP

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a simple and accurate two-step long dna sequences synthesis strategy to improve heterologous gene expression in pichia一个简单而准确的两步长的dna序列合成策略来提高外源基因表达在毕赤酵母属.pdf

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a simple and accurate two-step long dna sequences synthesis strategy to improve heterologous gene expression in pichia一个简单而准确的两步长的dna序列合成策略来提高外源基因表达在毕赤酵母属

A Simple and Accurate Two-Step Long DNA Sequences Synthesis Strategy to Improve Heterologous Gene Expression in Pichia 1 1 2 1 1 Jiang-Ke Yang *, Fang-Yuan Chen , Xiang-Xiang Yan , Li-Hong Miao , Jiang-Hong Dai 1 School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China, 2 School of Life Science, Huazhong University of Science and Technology, Wuhan, China Abstract In vitro gene chemical synthesis is a powerful tool to improve the expression of gene in heterologous system. In this study, a two-step gene synthesis strategy that combines an assembly PCR and an overlap extension PCR (AOE) was developed. In this strategy, the chemically synthesized oligonucleotides were assembled into several 200–500 bp fragments with 20– 25 bp overlap at each end by assembly PCR, and then an overlap extension PCR was conducted to assemble all these fragments into a full length DNA sequence. Using this method, we de novo designed and optimized the codon of Rhizopus oryzae lipase gene ROL (810 bp) and Aspergillus niger phytase gene phyA (1404 bp). Compared with the original ROL gene and phyA gene, the codon-optimized genes expressed at a significantly higher level in yeasts after methanol induction. We believe this AOE method to be of special interest as it is simple, accurate and has no limitation with respect to the size of the gene to be synthesized. Combined with de novo design, this method allows the rapid synthesis of a gene optimized for expression in the system of choice and production of sufficient biological material for molecular characterization and biotechnological application. Citation: Yang J-K, Chen F-Y, Yan X-X, Miao L-H, Dai J-H (2012) A Simple an