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Identified Hybrid tRNA Structure Genes in Archaeal Genome
Uttam Roy Mandal1, Shib Sankar Das2, Brajadulal Chattopadhyay3
1Department of Mathematics, Raidighi College, Raidighi, W.B., India.
Iranian Journal of Biotechnology
|March 21, 2020
Summary
This study introduces a computational method to identify hidden transfer RNA (tRNA) genes in archaea by searching for separated tRNA halves. The findings reveal hybrid tRNA genes, suggesting a novel mechanism for tRNA diversity in archaea.
Area of Science:
- Bioinformatics
- Molecular Biology
- Genomics
Background:
- Archaea possess complex tRNA gene structures, including intron-containing and split tRNAs.
- Identifying all archaeal tRNA genes is challenging due to hidden and split gene formats.
Purpose of the Study:
- To develop a computational method for detecting widely separated tRNA genes in archaeal genomes.
- To identify essential regions within genome sequences that constitute hidden tRNA genes.
Main Methods:
- Developed a tRNA search algorithm to predict split tRNA genes based on conserved 5' and 3' motifs.
- Utilized cloverleaf prediction and in silico analysis of bulge-helix-bulge secondary structures at splice sites.
Main Results:
- Constructed hybrid tRNA genes by combining essential regions from different tDNAs within the same archaeal species.
- Identified hybrid split tRNAs in multiple archaeal species, sharing common structural motifs like bulge-helix-bulge (BHB).
Conclusions:
- The algorithm successfully identified hybrid tRNAs in Metallosphaera sedula, Desulfurococcus kamchatkensis, and Ignicoccus hospitalis.
- Asymmetric combinations of tRNA halves likely contribute to the diversity of tRNA molecules in archaea.
- This research provides a new foundation for future studies on tRNA genes and their evolution.
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