生物技术通报 ›› 2016, Vol. 32 ›› Issue (5): 212-219.doi: 10.13560/j.cnki.biotech.bull.1985.2016.05.028

• 研究报告 • 上一篇    下一篇

GC夹对三种食源性致病菌的rpoB-PCR-DGGE图谱的影响

廖超12, 张昭寰12, 姚鑫12, 谢晶1, 张炜佳123, 潘迎捷123, 赵勇123   

  1. 1.上海海洋大学食品学院,上海 201306;
    2.农业部水产品贮藏保鲜质量安全风险评估实验室,上海 201306;
    3.上海水产品加工及贮藏工程技术研究中心,上海 201306
  • 收稿日期:2015-07-22 出版日期:2016-05-25 发布日期:2016-05-27
  • 作者简介:廖超,男,硕士研究生,研究方向:食品微生物风险评估;E-mail:liaochao2499@126.com
  • 基金资助:
    国家自然科学基金面上项目(31271870),上海市科委科技创新行动计划项目(14DZ1205100,14320502100),上海市科技兴农重点攻关项目(沪农科攻字2014第3-5号、2005第4-8号),上海市水产品加工及贮藏工程技术研究中心(11DZ2280300)

Effects of GC Clamps on RpoB-PCR-DGGE Fingerprint of Three Types of Food Borne Pathogens

LIAO Chao12,ZHANG Zhao-huan12,YAO Xin12,XIE Jing1,ZHANG Wei-jia123,PAN Ying-jie123,ZHAO Yong123 ,   

  1. 1. College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306;
    2. Laboratory of Quality & Safety Risk Assessment for Aquatic Production on Storage and Preservation,Ministry of Agriculture,Shanghai 201306;
    3. Shanghai Engineering Research Center of Aquatic Product Processing & Preservation,Shanghai 201306
  • Received:2015-07-22 Published:2016-05-25 Online:2016-05-27

摘要: 旨在探讨不同的GC夹以及GC夹连接引物的不同位置对3种食源性致病菌的DGGE图谱结果的影响,合成6对RNA聚合酶β亚基编码基因rpoB引物(rpoB 1-6),含3种不同GC夹(GC-1,GC-2,GC-3),且每种GC夹分别连接于正反引物5'端。应用rpoB-PCR-DGGE 对副溶血性弧菌(5株),单增李斯特菌(5株)和沙门氏菌(3株)进行分析,并与V3-PCR-DGGE和ERIC-PCR的图谱及聚类分析结果进行比较。结果显示,GC-3夹连接于反引物上的rpoB-PCR-DGGE分辨效果最好,分辨力指数达0.9,与ERIC-PCR相同,高于V3-PCR-DGGE。GC夹序列和连接引物位置均对rpoB-PCR-DGGE图谱结果产生影响。选择或设计无连续鸟嘌呤(G)排列的GC夹序列且将其连接于反引物5'端,均能有效提高rpoB-PCR-DGGE对食源性致病菌检测与分型的效果。

关键词: 副溶血性弧菌, 单增李斯特菌, 沙门氏菌, GC夹, rpoB-PCR-DGGE

Abstract: This work is to investigate the effect of different GC clamps and different positions of primers connected with GC clamps on the DGGE fingerprint of food borne pathogens. We synthesized 6 pairs of primers encoding RNA polymerase β subunit(rpoB 1-6)containing 3 different GC clamps(GC-1,GC-2 and GC-3)that linked to 5'endings of both forward and reverse primers,respectively. Then,rpoB-PCR-DGGE was used to analyze Vibrio parahaemolyticus(5 strains),Listeria monocytogenes(5 strains),and Salmonella spp.(3 strains). The results of fingerprint analysis were compared with that of V3-PCR-DGGE and ERIC-PCR. GC-3 clamp linked with reverse primer presented the best discriminating effect,and the discriminating index of rpoB-PCR-DGGE reached 0.9 that was equal to ERIC-PCR and greater than V3-PCR-DGGE. In conclusion,both of the different GC clamp sequences and linked positions of primers with GC clamp affected the result of rpoB-PCR-DGGE fingerprint. Choosing or designing GC clamp without continuous guanine(G base)and linked with 5'ending of reverse primer will improve the detecting and typing effect of rpoB-PCR-DGGE for food borne pathogens.

Key words: Vibrio parahemolyticus, Listeria monocytogenes, Salmonella spp., GC clamps, rpoB-PCR-DGGE