Abstract
BACKGROUND Shared traits between prokaryotes and eukaryotes are helpful in the understanding of the tree of life evolution. In bacteria and eukaryotes, it has been shown a particular organisation of tRNA genes as clusters, but this trait has not been explored in the archaea domain.OBJECTIVE Explore the occurrence of tRNA gene clusters in archaea.METHODS In-silico analyses of complete and draft archaeal genomes based on tRNA gene isotype and synteny, tRNA gene cluster content and mobilome elements.FINDINGS We demonstrated the prevalence of tRNA gene clusters in archaea. tRNA gene clusters, composed of archaeal-type tRNAs, were identified in two Archaea class, Halobacteria and Methanobacteria from Euryarchaeota supergroup. Genomic analyses also revealed evidence of the association between tRNA gene clusters to mobile genetic elements and intra-domain horizontal gene transfer.MAIN CONCLUSIONS tRNA gene cluster occurs in the three domains of life, suggesting a role of this type of tRNA gene organisation in the biology of the living organisms.
Highlights
Shared traits between prokaryotes and eukaryotes are helpful in the understanding of the tree of life evolution
Detection and distribution of Transfer RNAs (tRNAs) gene clusters among archaea genomes - In order to identify the presence of tRNA gene clusters in archaea genomes, we used the methodology described in a previous study.[7]. The analysis identified tRNA gene clusters in 29/2481 archaea genomes from GenBank (Table)
Shared traits between prokaryotes and eukaryotes are helpful in the understanding of the tree of life evolution. tRNA gene cluster, a particular feature in RNA gene organisation, has been demonstrated to be prevalent in bacteria and eukaryotes, but there is a gap concerning its occurrence in archaea
Summary
Shared traits between prokaryotes and eukaryotes are helpful in the understanding of the tree of life evolution. It has been shown a particular organisation of tRNA genes as clusters, but this trait has not been explored in the archaea domain
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