Authors

P. Ge;S. J. Zhang

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Abbreviated Journal Title

BMC Bioinformatics

Keywords

SECONDARY STRUCTURE PREDICTION; CONTEXT-FREE GRAMMARS; NONCODING RNAS; SEQUENCES; ALIGNMENTS; EVOLUTIONARY; CONSTRAINTS; INFORMATION; MICRORNAS; ELEMENTS; Biochemical Research Methods; Biotechnology & Applied Microbiology; Mathematical & Computational Biology

Abstract

Background: RNAalifold, a popular computational method for RNA consensus structure prediction, incorporates covarying mutations into a thermodynamic model to fold the aligned RNA sequences. When quantifying covariance, it evaluates conserved signals of two aligned columns with base-pairing rules. This scoring scheme performs better than some other approaches, such as mutual information. However it ignores the phylogenetic history of the aligned sequences, which is an important criterion to evaluate the level of sequence covariance. Results: In this article, in order to improve the accuracy of consensus structure folding, we propose a novel approach named PhyloRNAalifold. It incorporates the number of covarying mutations on the phylogenetic tree of the aligned sequences into the covariance scoring of RNAalifold. The benchmarking results show that the new scoring scheme of PhyloRNAalifold can improve the consensus structure detection of RNAalifold. Conclusion: Incorporating additional phylogenetic information of aligned sequences into the covariance scoring of RNAalifold can improve its performance of consensus structures folding. This improvement is correlated with alignment characteristics, such as pair-wise identity and the number of sequences in the alignment.

Journal Title

Bmc Bioinformatics

Volume

14

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

10

WOS Identifier

WOS:000320044000001

ISSN

1471-2105

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