食品科学 ›› 2009, Vol. 30 ›› Issue (15): 148-151.doi: 10.7506/spkx1002-6630-200915033

• 生物工程 • 上一篇    下一篇

稻米中PCR抑制因子抑制机理的研究

许文涛1 ,2,黄昆仑1 ,2,邓爱科1,罗云波1 ,*   

  1. 1. 中国农业大学食品科学与营养工程学院,食品安全检测与风险评估实验室 2. 农业部转基因生物食用安全监督检验测试中心(北京)
  • 收稿日期:2008-07-13 修回日期:2009-06-17 出版日期:2009-08-01 发布日期:2010-12-29
  • 通讯作者: 罗云波1 ,* E-mail:hkl009@163.com
  • 基金资助:

    国家“863”计划项目(2006AA10Z440);农业部“948”项目(2007-Z8)

Inhibition Mechanisms of PCR Inhibitors in Rice

XU Wen-tao1,2,HUANG Kun-lun1,2,DENG Ai-ke1,LUO Yun-bo1,*   

  1. 1. Laboratory of Safety Detecting and Risk Assessment, College of Food Science and Nutritional Engineering, China Agricultural
    University, Beijing 100083, China ; 2. Supervision, Inspection and Testing Center of Genetically Modified Food Safety, Ministry
    of Agriculture, Beijing 100083, China
  • Received:2008-07-13 Revised:2009-06-17 Online:2009-08-01 Published:2010-12-29
  • Contact: LUO Yun-bo1,* E-mail:hkl009@163.com

摘要:

针对在检测过程中发现的大米中存在PCR 抑制现象,对PCR 抑制因子作用机理进行研究。通过把糙米加工成精米和米麸后的实验证明,PCR 抑制因子主要存在于糙米的米麸中。研究间接证明PCR 抑制因子主要通过抑制Taq 聚合酶的酶活来抑制PCR 反应。尝试采用多种方法来对大米中的PCR 抑制因子进行鉴定,通过非变性电泳(PAGE)和电泳迁移率实验(EMSA)实验排除了大米中的PCR 抑制因子是大分子物质。

关键词: 稻米, 基因组, PCR, 抑制因子, 抑制机理

Abstract:

PCR inhibitory substances in the genomic DNA extracted from brown rice, polished rice and rice bran were analyzed and the inhibition mechanisms were explored. PCR inhibitors were mainly observed in rice bran. Indirect evidence also proved that PCR reaction was inhibited via the inhibition of Taq polymerase. PAGE and EMSA analysis revealed that macromolecules may not be the PCR inhibitors in rice.

Key words: rice, genome, PCR, inhibitory substances, inhibitory mechanism

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