Horizontal Gene Transfer of Chlamydial-Like tRNA Genes into Early Vascular Plant Mitochondria
| Autor: | Volker Knoop, Monika Polsakiewicz, Nils Knie |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Genetics
Mitochondrial DNA Genome evolution Chlamydiales Chloroplasts DNA Plant Gene Transfer Horizontal Huperzia Plants Mitochondrion Biology biology.organism_classification Genome Evolution Molecular Genes Mitochondrial Selaginella moellendorffii RNA Transfer Genes Bacterial Horizontal gene transfer Transfer RNA Molecular Biology Gene Phylogeny Ecology Evolution Behavior and Systematics |
| Zdroj: | Molecular Biology and Evolution. 32:629-634 |
| ISSN: | 1537-1719 0737-4038 |
| DOI: | 10.1093/molbev/msu324 |
| Popis: | Mitochondrial genomes of lycophytes are surprisingly diverse, including strikingly different transfer RNA (tRNA) gene complements: No mitochondrial tRNA genes are present in the spikemoss Selaginella moellendorffii ,w hereas 26 tRNAs are encoded in the chondrome of the clubmoss Huperzia squarrosa. Reinvestigating the latter we found that trnL(gag) and trnS(gga) had never before been identified in any other land plant mitochondrial DNA. Sensitive sequence comparisons showed these two tRNAs as well as trnN(guu) and trnS(gcu) to be very similar to their respective counterparts in chlamydial bacteria. We identified homologs of these chlamydial-type tRNAs also in other lycophyte, fern, and gymnosperm DNAs, suggesting horizontal gene transfer (HGT) into mitochondria in the early vascular plant stem lineages. These findings extend plant mitochondrial HGT to affect individual tRNA genes, to include bacterial donors, and suggest that Chlamydiae on top of their recently proposed key role in primary chloroplast establishment may also have participated in early tracheophyte genome evolution. |
| Databáze: | OpenAIRE |
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