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Archaea
Volume 2014, Article ID 671059, 6 pages
http://dx.doi.org/10.1155/2014/671059
Research Article

Genome-Wide miRNA Seeds Prediction in Archaea

1State Key Lab of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
2Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100781, China

Received 4 March 2014; Revised 14 April 2014; Accepted 28 April 2014; Published 14 May 2014

Academic Editor: Paola Londei

Copyright © 2014 Shengqin Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Growing evidence indicates that miRNA genes exist in the archaeal genome, though the functional role of such noncoding RNA remains unclear. Here, we integrated the phylogenetic information of available archaeal genomes to predict miRNA seeds (typically defined as the 2–8 nucleotides of mature miRNAs) on the genomic scale. Finally, we found 2649 candidate seeds with significant conservation signal. Eleven of 29 unique seeds from previous study support our result ( value ), which demonstrates that the pipeline is suitable to predict experimentally detectable miRNA seeds. The statistical significance of the overlap between the detected archaeal seeds and known eukaryotic seeds shows that the miRNA may evolve before the divergence of these two domains of cellular life. In addition, miRNA targets are enriched for genes involved in transcriptional regulation, which is consistent with the situation in eukaryote. Our research will enhance the regulatory network analysis in Archaea.