FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (9): 180-184.doi: 10.7506/spkx1002-6630-201309037

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Expression, Purification and Polyclonal Antibody Preparation of the Flagellin Gene fliC of Salmonella typhimurium

CHEN Ming1,2,XU Xing-lian2,ZHOU Guang-hong2,TANG Xiao-yan1,*,YUAN Fei3,CHEN Ai-liang1   

  1. 1. Key Laboratory of Agri-food Safety and Quality, Ministry of Agriculture, Institute of Quality Standards and Testing Technology
    for Agri-products, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2. Key Laboratory of Meat Processing and
    Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University,
    Nanjing 210095, China;3. Chinese Academy of Inspection and Quarantine, Beijing 100123, China
  • Received:2012-05-10 Revised:2013-04-10 Online:2013-05-15 Published:2013-05-07
  • Contact: TANG Xiao-yan E-mail:txycaas@126.com

Abstract:

In this study, the flagellar gene fliC of Salmonella typhimurium was amplified by PCR from the Salmonella
genome, and cloned into the prokaryotic expression vector pET28a(+). After being sequenced, the recombinant plasmid
pET28a-fliC was transformed into strain BL21(DE3)pLysS, and FliC protein was expressed by the recombinant strain after
IPTG(1 mmol/L) induction. By Ni-NTA purification, the 6×His-tagged proteins were extracted. The molecular weight of
the induced protein was about 54.6 kD as expected. And most of the expressed products were soluble. Western-blotting
analysis indicated that the expressed proteins had a specific reactivity with the monoclonal anti-His-Tag antibody. Polyclonal
antibodies were obtained via immunizing BALB/c mice with the purified protein, and the results showed that the polyclonal
antibodies had high titer and good specificity.

Key words: Slamonella typhimurium, flagellar, prokaryotic expression, purification, identification, polyclonal antibodies

CLC Number: