國家衛生研究院 NHRI:Item 3990099045/8855
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/8855


    Title: The dnaJ gene as a molecular discriminator to differentiate among species and strain within the Lactobacillus casei group
    Authors: Huang, CH;Chang, MT;Huang, L;Chu, WS
    Contributors: Institute of Biotechnology and Pharmaceutical Research
    Abstract: Identifying Lactobacillus casei and its closely related taxa at the species and strain level using only phenotypic and genotypic (16S rDNA sequence homology analysis) techniques often yields inaccurate results. In this study, the dnaJ chaperone gene was investigated as a molecular target for inter- and intraspecies discrimination within the Lb. casei group as well as for the development of specific primers for species identification. The results showed that most of the examined strains could be clearly distinguished from closely related species based on the sequenced fragments. At the interspecies level, the dnaJ sequence similarities were 81.7%–85.5%. However, at the intraspecies level, the dnaJ sequence similarities were 96.2–100% and could be assigned to different haplotypes in Lactobacillusparacasei and Lactobacillusrhamnosus, respectively. Compared to the 16S rRNA gene, the dnaJ sequence showed greater variation at both the species and strain level. Thus, the dnaJ gene can be proposed as an alternative marker for the Lb. casei group that provides higher discriminatory power than the 16S rRNA gene. In addition, species-specific primers were developed and subsequently employed in two-plex minisequencing analysis and shown to be specific for Lb. paracasei and Lb. rhamnosus. Our data indicate that phylogenetic relationships in the Lb. casei group can be resolved using comparative sequence analysis of the dnaJ gene and that the Lb. paracasei and Lb. rhamnosus species can be simultaneously identified using a novel species-specific minisequencing assay.
    Date: 2015-12
    Relation: Molecular and Cellular Probes. 2015 Dec;29(6):479-484.
    Link to: http://dx.doi.org/10.1016/j.mcp.2015.05.016
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0890-8508&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000367211900021
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84951573735
    Appears in Collections:[Others] Periodical Articles

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