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中国精品科技期刊2020

嗜酸乳杆菌zrx02的plnD基因克隆及生物信息学分析

冉军舰, 蔡丽丽, 焦凌霞, 梁新红, 卢艳清, 赵瑞香

冉军舰, 蔡丽丽, 焦凌霞, 梁新红, 卢艳清, 赵瑞香. 嗜酸乳杆菌zrx02的plnD基因克隆及生物信息学分析[J]. 食品工业科技, 2017, (24): 137-141. DOI: 10.13386/j.issn1002-0306.2017.24.027
引用本文: 冉军舰, 蔡丽丽, 焦凌霞, 梁新红, 卢艳清, 赵瑞香. 嗜酸乳杆菌zrx02的plnD基因克隆及生物信息学分析[J]. 食品工业科技, 2017, (24): 137-141. DOI: 10.13386/j.issn1002-0306.2017.24.027
RAN Jun-jian, CAI Li-li, JIAO Ling-xia, LIANG Xin-hong, LU Yan-qing, ZHAO Rui-xiang. PlnD gene clone of Lactobacillus acidophilus zrx02 and bioinformatic analysis[J]. Science and Technology of Food Industry, 2017, (24): 137-141. DOI: 10.13386/j.issn1002-0306.2017.24.027
Citation: RAN Jun-jian, CAI Li-li, JIAO Ling-xia, LIANG Xin-hong, LU Yan-qing, ZHAO Rui-xiang. PlnD gene clone of Lactobacillus acidophilus zrx02 and bioinformatic analysis[J]. Science and Technology of Food Industry, 2017, (24): 137-141. DOI: 10.13386/j.issn1002-0306.2017.24.027

嗜酸乳杆菌zrx02的plnD基因克隆及生物信息学分析

基金项目: 

河南省高校重点科研项目(18A550006); 河南省高校科技创新人才支持计划(17HASTIT037); 河南科技学院高层次人才科研项目(2015016);

详细信息
    作者简介:

    冉军舰 (1981-) , 男, 博士, 副教授, 研究方向:食品生物技术的研究, E-mail:ranjunjian@126.com。;

    赵瑞香 (1966-) , 女, 博士, 教授, 研究方向:食品营养因子的研究, E-mail:zhaoruixiang103@126.com。;

  • 中图分类号: Q78;TS201.3

PlnD gene clone of Lactobacillus acidophilus zrx02 and bioinformatic analysis

  • 摘要: 目的:对zrx02嗜酸乳杆菌细菌素编码基因进行克隆与序列分析。方法:对分离出的菌株进行16S rRNA鉴定,并根据已报道的plnD编码产物基因设计引物,以该菌基因组DNA为模板进行PCR扩增和测序,利用Pro Param tool,TMHMM等在线软件对编码蛋白进行生物信息学分析。结果:该菌为嗜酸乳杆菌,命名为嗜酸乳杆菌zrx02,该菌含有plnD基因,通过与Gen Bank中相关的抗菌素基因进行比对,发现其基因序列与Gen Bank库中的Lactobacillus plantarum strain(WP 016526896.1)plnD gene的同源性达到100%。生物信息学分析显示该基因全长355 bp,编码92个氨基酸,相对分子量10.54 ku,理论等电点9.26,该基因编码蛋白是稳定蛋白,不具有明显的跨膜结构,二级结构主要有α-螺旋、无规则卷曲和延伸链组成,三级结构结果显示plnD蛋白模型与Streptococcus pneumoniae中的ComE同源性最高。结论:对嗜酸乳杆菌zrx02 plnD基因的克隆与分析,为进一步探究细菌素的形成机制奠定理论基础。 
    Abstract: Objective: Lactobacillus acidophilus produces bacteriocin, bacteriocin gene was cloned and sequence was analyzed.Methods: The isolated strain was identified by 16 S rRNA.Primers were designed based on the reports plnD gene, the bacteriocin related genes of Lactobacillus acidophilus zrx02 was amplified by PCR and sequenced, then the bioinformatics were determined using online software ( Pro Param tool, TMHMM) . Results: The strain was identified as Lactobacillus acidophilus and named Lactobacillus acidophilus zrx02.The gene essential for plnD was present in Lactobacillus acidophilus zrx02, which was naturally clustered from Lactobacillus acidophilus in Gen Bank, the gene sequence of the plnD gene exhibited high similarity up to 100% to that of Lactobacillus plantarum strain ( WP 016526896.1) plnD gene.The results of sequencing showed that the full length of the plnD gene was 355 bp, which coded for 92 amino acid residues, with molecular weight of 10.54 ku, theoretical PI of 9.26, plnD encoded protein was stable protein. In addition, there was no obvious transmembrane structure present in the encoded product.The secondary structure of protein consists of α-helix, random coil and extended strand. The protein tertiary structure exhibited high similarity to ComE from Streptococcus pneumonia. Conclusion: The cloning and analysis of plnD gene in Lactobacillus acidophilus zrx02 are helpful to further explore of bacteriocin production.
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  • 收稿日期:  2017-06-05

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