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中华口腔医学研究杂志(电子版) ›› 2012, Vol. 06 ›› Issue (06) : 479 -483. doi: 10.3877/cma.j.issn.1674-1366.2012.06.001

基础研究

变形链球菌荧光报告株的构建和鉴定
霍丽珺1, 刘红艳1, 凌均棨1,(), 黄湘雅1   
  1. 1.510055 广州,中山大学光华口腔医学院·附属口腔医院,广东省口腔医学重点实验室
  • 收稿日期:2012-05-27 出版日期:2012-12-01
  • 通信作者: 凌均棨
  • 基金资助:
    国家自然科学基金(30973320)中山大学重大项目培育和新兴、交叉学科资助计划(10ykjc16)

The construction and identification of the ldh-luc reporter strain of Streptococcus mutans and the reporter strain

Li-jun HUO1, Hong-yan LIU1, Jun-qi LING1,(), Xiang-ya Huang1   

  1. 1.Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
  • Received:2012-05-27 Published:2012-12-01
  • Corresponding author: Jun-qi LING
引用本文:

霍丽珺, 刘红艳, 凌均棨, 黄湘雅. 变形链球菌荧光报告株的构建和鉴定[J/OL]. 中华口腔医学研究杂志(电子版), 2012, 06(06): 479-483.

Li-jun HUO, Hong-yan LIU, Jun-qi LING, Xiang-ya Huang. The construction and identification of the ldh-luc reporter strain of Streptococcus mutans and the reporter strain[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2012, 06(06): 479-483.

目的

探讨变形链球菌(S.mutans)荧光素酶(luc)基因报告株构建方法,拟为探讨抗菌剂对多菌种生物膜中S.mutans 的作用提供研究基础。

方法

将S.mutans UA159 乳酸脱氢酶(ldh)基因及其上游部分约1 100 000 片段克隆至自杀质粒pFW5-luc 的多克隆位点,构建重组质粒,并经酶切和测序证实。 采用自然转化的方法,实现重组自杀质粒和S.mutans UA159 同源序列的单次交换。

结果

经过聚合酶链反应(PCR)和测序分析,筛选出具有报告活性的S.mutans ldh-luc基因荧光报告株。

结论

成功构建了S.mutans ldh-luc 基因荧光报告株。

Objective

To construct the ldh-luc reporter strain of Streptococcus mutans (S.mutans) and identity the reporter strain.

Methods

Approximately 1 100 000 of sequence upstream of the ldh start codon from S.mutans genome were amplified and cloned to the suicide vector pFW5-luc.Confirmed constructs were transformed into S.mutans and integrated via single crossover homologous recombination. The expected integration was confirmed in antibiotic-resistant clones by PCR and sequencing.

Results

The ldh-luc reporter strain of S.mutans was selected and confirmed by PCR and sequencing analysis of multiple clones for similar reporter activity.

Conclusion

An ldh-luc reporter strain of S.mutans was constructed successfully.

表1 实验用菌株和质粒
图1 pJM1-ldh 质粒及pFW5-luc 质粒双酶切产物电泳 M1:λ-Hind ⅢDNA Marker;M2:DL2000 DNA Marker;1:pFW5-luc质粒酶切产物;2:pJM1-ldh 质粒酶切产物
图2 pJM1-ldh 质粒双酶切后电泳结果 M1:λ-HindⅢDNA Marker; M2:DL2000 DNA Marker; 1:pFW5-luc Vector; 2:pJM1-ldh-1 酶切产物; 3:pJM1-ldh-2 酶切产物; 4:pJM1-ldh Insert
图3 S.mutans 转化株PCR 产物电泳 M:1 000 000 DNA Ladder Marker; 1 ~6:S.mutans 转化株PCR 产物;7 ~8:S.mutans UA159 野生株PCR 产物; 9 ~10:pJM1-ldh PCR 产物
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