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 × 扫一扫
基础研究
收稿日期:
出版日期:
通信作者:
基金资助:
Li-jun HUO1, Hong-yan LIU1, Jun-qi LING1,†(), Xiang-ya Huang1
Received:
Published:
Corresponding author:
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.