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园艺学报 ›› 2013, Vol. 40 ›› Issue (4): 762-.

• 研究报告 • 上一篇    下一篇

瓜类褪绿黄化病毒p22 基因在大肠杆菌中的表达及抗血清的制备

 施 艳, 王振跃, 袁 媛, 刘珊珊, 孙 虎, 古勤生   

  1. (1 河南农业大学植物保护学院,郑州 450002;2 河南省农业科学院植物保护所,郑州 450002;3 中国农业科学院郑
    州果树所,郑州 450009)
  • 出版日期:2013-04-25 发布日期:2013-04-25

Expression of p22 Gene of Cucurbit chlorotic yellows virus in Escherichia coli and Preparation of Antiserum

SHI   Yan, WANG  Zhen-Yue, YUAN   Yuan, LIU  Shan-Shan, SUN   Hu, GU  Qin-Sheng   

  1. (1College of Plant Protection,Henan Agricultural University,Zhengzhou 450002,China;2Plant Protection Institute,
    Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;3Zhengzhou Fruit Research Institute,Chinese
    Academy of Agriculture Sciences,Zhengzhou 450009,China)
  • Online:2013-04-25 Published:2013-04-25

摘要: 以被瓜类褪绿黄化病毒(Cucurbit chlorotic yellows virus,CCYV)侵染的甜瓜叶片为供试材
料,采用RT-PCR 方法克隆其P22 蛋白基因,并将其连接到原核表达载体pGex-4T-3 上,PCR 验证及克隆
测序确定开放阅读框的正确性。将重组载体pGexp22 转化大肠杆菌BL21 菌株,诱导表达,SDS-PAGE 分
析表明,经IPTG 诱导,p22 基因在大肠杆菌BL21 中得到了高效表达。以表达的蛋白作为抗原,免疫家
兔,制备了CCYV P22 的特异性抗血清。ACP-ELISA 检测结果表明,血清效价高达1.28 × 105。Western blot
检测甜瓜叶片,结果表明抗血清能够特异性地检测CCYV 侵染的甜瓜叶片中的CCYV P22 蛋白。

关键词: 甜瓜, 瓜类褪绿黄化病毒, P22, 原核表达, 抗血清

Abstract: p22 gene was amplified by RT-PCR from CCYV infected melon leaves and cloned into the
prokaryotic expression vector pGex-4T-3. After verification by PCR and sequencing,the recombinant
plasmid was transformed to Escherichia coli strain BL21 for protein expression. The SDS-PAGE analyses
showed that 48 kD specific fusion protein was highly expressed after induction by IPTG. The expressed
protein was purified from SDS-PAGE and the antiserum against the protein was raised in rabbit. The titer
of antiserum was 1.28 × 105 estimated by ACP-ELISA. Western blot analysis confirmed that the antiserum
reacted specifically with P22 protein of CCYV.

Key words: melon, Cucurbit chlorotic yellows virus, P22, prokaryotic expression, antiserum

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