集胞藻6803NdhO蛋白多克隆抗体制备及其初步应用

中国生物工程杂志

2011, Vol. 31

Issue (06): 64-69

研究报告

集胞藻6803NdhO蛋白多克隆抗体制备及其初步应用

赵娇红, 高复旦, 魏兰珍, 王全喜, 马为民

上海师范大学生命与环境科学学院上海 200234

Preparation and Preliminary Application of Polyclonal Antibody of NdhO Protein in the Cyanobacterium Synechocystis sp. Strain PCC 6803

ZHAO Jiao-hong, GAO Fu-dan, WEI Lan-zhen, WANG Quan-xi, MA Wei-min

College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200234, China

全文: PDF(734 KB) HTML

摘要：

蓝藻NADPH脱氢酶(NDH-1)是一种重要的光合膜蛋白复合体,参与CO₂吸收、围绕光系统I的循环电子传递和细胞呼吸。迄今为止,人们在蓝藻细胞中已鉴定出17种NDH-1复合体亚基(NdhA-NdhQ)。最近,人们还获得了NdhO亚基的缺失突变株。然而,人们对NdhO亚基的研究还不充份,至今仍不清楚它的功能角色。通过PCR扩增出集胞藻6803 NdhO亚基编码基因ndhO,构建表达质粒pET32a(+)-ndhO,转化大肠杆菌BL21(DE3)pLysS,用IPTG诱导表达、经His-tag纯化后免疫日本大耳白兔获得多克隆抗体。间接ELISA法揭示NdhO抗体效价可高达1 ∶ 1 025 000;蛋白免疫印迹确定该抗体具有高度特异性。应用该抗体进行蛋白免疫印迹检测,结果发现NdhO亚基仅存在于NDH-1活性复合体中。因此,NdhO多克隆抗体的获得将为进一步阐明该亚基所担任的功能角色奠定了生化基础。

关键词： NdhO蛋白; 多克隆抗体; 集胞藻6803

Abstract:

Cyanobacterial NADPH dehydrogenase (NDH-1) is an important photosynthetic membrane protein complex, and is essential to CO₂ uptake, cyclic electron transport around photosystem I and cellular respiration. This enzyme accepts electrons from NADPH and consists of at least 17 subunits, i.e., NdhA to NdhQ. Recently, an ndhO gene inactivation mutant, ΔndhO, has also successfully been obtained. However, little is known regarding the functional roles of NdhO subunit in cyanobacteria. Therefore, the encoding gene, ndhO, was PCR amplified from the unicellular cyanobacterium Synechocystis sp. strain PCC 6803, the expression plasmid pET32a(+)-ndhO was constructed and transformed into BL21(DE3)pLysS, and the expression of NdhO protein was induced by IPTG. After purification, the fusion protein pET-NdhO was used to immunize Japanese white rabbit to obtain the polyclonal antibody. The titer of the polyclonal antibody was detected by ELISA and its specificity was analyzed by immunoblotting. The titer of polyclonal antibody was found to be up to 1 ∶ 1 025 000, and thus possessed a high specificity. Further, immunoblotting results using the polyclonal antibody showed the presence of NdhO in active NDH-1 mediumcomplex, and not active NDH-1 supercomplex. Therefore, the antibody of NdhO obtained will further help us to reveal the functional roles of cyanobacterial NdhO subunit.

Key words: NdhO Polyclonal antibody Synechocystis sp. strain PCC 6803

收稿日期: 2011-02-03 出版日期: 2011-06-28

ZTFLH:

Q819

基金资助:

国家自然科学基金(30770175)、国家"973"计划(2009CB118500)、教育部重点项目(209045)、上海市教委科研创新重点项目(08ZZ67)资助项目

通讯作者: 马为民 E-mail: wma@shnu.edu.cn

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引用本文:

赵娇红, 高复旦, 魏兰珍, 王全喜, 马为民. 集胞藻6803NdhO蛋白多克隆抗体制备及其初步应用[J]. 中国生物工程杂志, 2011, 31(06): 64-69.

ZHAO Jiao-hong, GAO Fu-dan, WEI Lan-zhen, WANG Quan-xi, MA Wei-min. Preparation and Preliminary Application of Polyclonal Antibody of NdhO Protein in the Cyanobacterium Synechocystis sp. Strain PCC 6803. China Biotechnology, 2011, 31(06): 64-69.

链接本文:

https://manu60.magtech.com.cn/biotech/CN/ 或 https://manu60.magtech.com.cn/biotech/CN/Y2011/V31/I06/64

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