食品科学 ›› 2010, Vol. 31 ›› Issue (1): 185-188.doi: 10.7506/spkx1002-6630-201001043

• 专家约稿 • 上一篇    下一篇

哈尔滨风干肠中优势解蛋白菌筛选及16SrDNA鉴定

张根生,李大龙,李 志,岳晓霞   

  1. 哈尔滨商业大学食品工程学院
  • 收稿日期:2009-06-09 出版日期:2010-01-01 发布日期:2014-05-19
  • 通讯作者: 张根生 E-mail:zhanggsh@163.com
  • 基金资助:

    黑龙江省科技攻关项目(GB04B404-03)

Screening and 16S rDNA Sequence-based Identification of Proteolytic Strains from Harbin Dried Sausage

ZHANG Gen-sheng,LI Da-long,LI Zhi,YUE Xiao-xia   

  1. Institute of Food Science and Engineering, Harbin University of Commerce, Harbin 150076, China
  • Received:2009-06-09 Online:2010-01-01 Published:2014-05-19
  • Contact: ZHANG Gen-sheng, E-mail:zhanggsh@163.com

摘要:

以哈尔滨风干肠中41 株球菌为对象,进行降解蛋白质酶活力的研究。采用定性和定量两种方法,筛选具有降解蛋白质酶活力的菌株,并对筛选出的菌株通过提取其DNA,进行PCR 扩增, 16S rDNA 序列测定,进行系统的分类鉴定。结果表明:41 株菌中只有10 株菌具有降解蛋白质酶活性,其中CHMS34.1、 CHMS34.3、CHMS34.9 、CHMS34.15,4 株具有较高的降解蛋白质酶活力,其酶活力分别为282、312、310、305U。4 株解蛋白质菌的16S rDNA 序列与GenBank 中的已知序列相似性很高,确定了CHMS34.1、 CHMS34.15 为Staphylococcuspasteuri 种菌株,CHMS34.3 为Staphylococcus simiae 种菌株, CHMS34.9 为Staphylococcus xylosus 种菌株。

关键词: 哈尔滨风干肠菌库, 降解蛋白质酶活力, 16S rDNA

Abstract:

A total of 41 cocci strains were isolated from Harbin dried sausage to evaluate their potential proteolytic activity by qualitative and quantitative methods. Total genomic DNA was extracted from these strains with proteolytic activity and then was subjected to PCR amplification and 16S rDNA sequencing for the identification of their systematic classification. Results indicated that 10 of these strains had proteolytic activity. CHMS34.1, CHMS34.3, CHMS34.9 and CHMS34.15 exhibited strong proteolytic activity, which were 282, 312, 310 U and 305 U, respectively. Meanwhile, their 16SrDNA sequences exhibited a high similarity with those of some strains of Staphylococcus presented in GenBank. Therefore, systematic classification revealed that CHMS34.1 and CHMS34.15 belonged to the Staphylococcus pasteuri family, CHMS34.3 the Staphylococcus simiae family, and CHMS34.9 the Staphylococcus xylosus family.

Key words: microbial pool of Harbin dried sausage, proteolytic strain, 16S rDNA

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