Molecular cloning of dihydroflavonol 4-reductase gene from grape berry and preparation of an anti-DFR polyclonal antibody
文献类型： 外文期刊
作者： Zhang, Ping 1 ; Wen, Peng-Fei 1 ; Wan, Si-Bao 1 ; Wang, Wei 1 ; Pan, Qiu-Hong 1 ; Zhan, Ji-Chen 1 ; Huang, Wei-Dong 1 ;
作者机构： 1.China Agr Univ, Coll Food Sci & Nutr Engn, Beijing 100083, Peoples R China
2.XinJiang Acad Agr Sci, Inst Hort, Urumqi 830000, Peoples R China
3.Shanxi Agr Univ, Coll Hort, Taigu 030801, Shanxi, Peoples R China
关键词： DFR;Escherichia coli expression;antibody..;purification;grape berry
期刊名称：VITIS （ 影响因子：1.339； 五年影响因子：1.306 ）
ISSN： 0042-7500
年卷期： 2008 年 47 卷 3 期
页码：
收录情况： SCI
摘要： Dihydroflavonol 4-reductase (DFR, EC 1.1.1.219) is a key enzyme of the flavonoid pathway, which synthesizes numerous secondary metabolites to determine the quality of grape berry and wine. The full-length dfr cDNA wit h 1014 bp was cloned from grape berry, and then introduced into an expressed plasmid pET-30a (+) vector at the EcoR I and Xho I restriction sites. With induction of the isopropyl-beta-D-thiogalactoside (IPTG), the pET-dfr was highly expressed in Escherichia coli BL21 (DE3) pLysS cells. A fusion protein with the His-Tag was purified through Ni-NTA His Bind Resin and then used as the antigen to immunize a New Zealand rabbit. The resulting antiserum was further purified precipitated by 50 % saturated ammonium sulfate and DEAE-Sepharose FF chromatography to obtain the immunoglobulin G (IgG) fraction. The resulting polyclonal antibody was found capable of immuno-recognizing the DFR of the crude protein extracts from grape berry. This work undoubtedly provides the possibility for further studies on biological regulation of DFR activity in grape berry.
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