FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (23 ): 262-265.doi: 10.7506/spkx1002-6300-200923059

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Extraction of Flagellin from Listeria monocytogenes

CHEN Gang,LAI Wei-hua*,DUAN Xia   

  1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Received:2009-07-03 Online:2009-12-01 Published:2010-12-29
  • Contact: LAI Wei-hua E-mail:talktolaiwh@163.com

Abstract:

In this study, the extraction of flagellin from Listeria monocytogenes was studied. Listeria monocytogenes IVb was cultured at 23 ℃ and 37 ℃, respectively. Stronger flagellin-producing capability was observed at 23 ℃ of culture condition. Flagellin was purified through ultra-centrifugation and ammonia sulfate precipitation after acid hydrolysis treatment of Listeria monocytogenes. Results from SDS-PAGE and electronic microscope revealed that ultra-centrifugation combined ammonia sulfate precipitation was an applicable method for flagellin extraction because this simple and time-saving method could provide flagellin with high purity and high yield.

Key words: Listeria monocytogenes, acid hydrolysis, flagellin, ultra-centrifugation

CLC Number: