A New Molecular Approach Based on the Secondary Structure of Ribosomal RNA for Phylogenetic Analysis of Mobilid Ciliates

Current Microbiology
Yan-Hong DuFahui Tang

Abstract

We analyzed the secondary structure of the small subunit (SSU) rRNA genes of Mobilida (Ciliophora, Peritrichia) and found that the secondary structures of some regions within the SSU-rRNA gene are distinct between the families Trichodinidae and Urceolariidae. Therefore, some of these important regions including H10, H11, H17, H47, H29, H30, H37, E10-1, H45-H46, and V4 (E23-4, E23-7) could be used as the barcodes for classification of these two families. In contrast, V4 (E23-1, E23-2) belongs to a hypervariable region and is not a good barcode at the genus level because of its great inter-specific variation. Our results indicated that the comprehensive analysis of the secondary structure of SSU-rRNA genes is a reliable auxiliary approach for phylogenic study of mobilid ciliates. It was further found that the coevolution between hosts or habitats and the Mobilida ciliates was existent, because the host types and their habitats were critical ecological factors that influenced the evolution of Mobilida ciliates.

References

Jan 23, 2003·Bioinformatics·Peter De RijkRupert De Wachter
Jun 26, 2003·Nucleic Acids Research·Michael Zuker
Aug 13, 2003·Bioinformatics·Fredrik Ronquist, John P Huelsenbeck

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Datasets Mentioned

BETA
HQ407386
AY788099
AY102172
GU906246
FJ499386
HQ407388
FJ499388
EU039896

Software Mentioned

Mobilida
RNA
MrBayes
BI
RNAViz
ML
HPC2 XSEDE
RAxML

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