Abstract
Capillary electrophoresis (CE) has been the principle system for nucleic acid analysis since the early 1990s due to its inherent advantages such as fast analysis time, high resolution and efficiency, minimal sample requirement, high detection sensitivity, and automation. In the past few decades, microbial community fingerprinting methods such as terminal restriction fragment length polymorphism and single-stranded conformation polymorphism (SSCP) have migrated to CE to utilize its advantages over conventional slab gel electrophoresis. Recently, a gel-based direct rRNA fingerprint method was demonstrated. Different from other existing microbial community characterization approaches, this novel approach is polymerase chain reaction free and capable of providing information on the relative abundance of rRNA from individual phylotypes in low-diversity samples. As a gel-based method, it has a long analysis time and relatively large reagent and sample requirements. Here, we addressed these limitations by transferring the RNA fingerprint approach to the CE platform. Analysis time significantly improved from 24 h to 60 min, and the use of a fluorescently labeled hybridization probe as the detection strategy decreased the sample requirement by ten-fold. The combination of fast analysis time, low sample requirement, and sensitive fluorescence detection makes CE-RNA-SSCP an appealing new approach for characterizing low-diversity microbial communities.
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Acknowledgments
This study was supported by the Australian Antarctic Division through Australia Antarctic science program grant. The authors acknowledge the University of Tasmania for Tasmania Postgraduate Research Scholarship awarded to YHN. MCB would like to thank the Australian Research Council for funding and provision of a QEII Fellowship (DP0984745), and MM would like to thank the Australian Research Council for funding and provision of a Future Fellowship (FT100100078).
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Nai, Y.H., Zemb, O., Gutierrez-Zamora, ML. et al. Capillary electrophoresis ribosomal RNA single-stranded conformation polymorphism: a new approach for characterization of low-diversity microbial communities. Anal Bioanal Chem 404, 1897–1906 (2012). https://doi.org/10.1007/s00216-012-6268-0
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DOI: https://doi.org/10.1007/s00216-012-6268-0