BMC Plant Biology

official impact factor 4.09

Open Access Highly Access Research article

Evidence for the rapid expansion of microRNA-mediated regulation in early land plant evolution

Isam Fattash1, Björn Voß2, Ralf Reski1, Wolfgang R Hess2 and Wolfgang Frank1*

Author Affiliations

1 Faculty of Biology, Institute of Biology II, Plant Biotechnology, University of Freiburg, Schaenzlestrasse 1, 79104 Freiburg, Germany

2 Faculty of Biology, Institute of Biology II, Experimental Bioinformatics, University of Freiburg, Schaenzlestrasse 1, 79104 Freiburg, Germany

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BMC Plant Biology 2007, 7:13 doi:10.1186/1471-2229-7-13

Published: 14 March 2007

Additional files

Additional file 1:

Non redundant set of cloned sRNA sequences after filtering. The table shows the complete non-redundant set of sRNA sequences which have been obtained from the sRNA cloning approach. Only those sRNA sequences are listed which did not show homologies to rRNA, tRNA or chloroplast encoded RNA sequences deposited in Rfam.

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Open Data

Additional file 2:

Precursor structures of Physcomitrella miRNAs. Fold back analysis of identified potential precursor sequences. Genomic sequences and EST sequences harboring regions identical to sequences of cloned and predicted sRNAs were trimmed and clustered. The non-redundant set of singlets and contigs was used for structural analysis using the RNAshapes program. The mature miRNA sequences within the precursors are highlighted in red.

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Additional file 3:

miRBase annotations of identified Physcomitrella miRNAs. The table shows annotations of the identified Physcomitrella miRNAs which were deposited in miRBase.

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Open Data

Additional file 4:

Precursor of a putative rice homolog of Physcomitrella miRNA 4–12. The reciprocal search with microHARVESTER using all Physcomitrella miRNAs without previously found homologs in other plants identified a putative homolog for miRNA 4–12 in rice. The corresponding precursor structure of this rice miRNA is depicted in this figure.

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Additional file 5:

Comparison of conserved plant miRNAs. In order to analyze conserved plant miRNA families all Physcomitrella miRNAs, as well as all plant miRNAs deposited in miRBase, were compared. miRNA sequences which were at least present in two different plant species are listed and the numbers of corresponding precursor sequences are provided.

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Additional file 6:

Sequence alignments of Physcomitrella miRNAs and their putative targets. The figure shows all sequence alignments between Physcomitrella miRNAs and their putative targets detected in a Physcomitrella EST database using the RNAhybrid program.

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Open Data