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Improvement of megaprimer method for site-directed mutagenesis and its application to phytase |
Haiqiang LU1, Hongwei YU1, Runfang GUO1, Yingmin JIA1,2() |
1. Food Science and Technology College Agricultural University of Hebei, Baoding 071000, China; 2. Hebei University of Science and Technology, Shijiazhuang 05000,China |
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Abstract Site-directed mutagenesis is used extensively for probing gene function. In this paper we describe an improved megaprimer method to the site-directed mutagenesis of phytase from Aspergillus niger, which allowed the mutations to be performed more efficiently in less time than other traditional methods. Three rounds of PCR and two pairs of primers were required in this method, and additionally, the restriction enzyme Dpn I was used for the elimination of template instead of the gel purification in this process. The entire procedure was performed in one tube. Moreover, this method was easier for obtaining large mutant genes than other methods. We successfully carried out the site-directed mutagenesis of phytase by adopting this method.
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Keywords
site-directed mutagenesis
phytase
the single-stranded product
PCR
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Corresponding Author(s):
JIA Yingmin,Email:ymjia0312@163.com
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Issue Date: 05 March 2009
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