ArticleBMC genomics2021
Evolution and structural variations in chloroplast tRNAs in gymnosperms.
Article in BMC genomics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 10 citations in OpenAlex.
- Comparative genomics, phylogenomic reconstruction and divergence time analysis of 32Frontiers in plant science · 2026Article
- Phylogenomics and plastomics offer new evolutionary perspectives on Kalanchoideae (Crassulaceae).Annals of botany · 2024Article
- Anticodon table of the chloroplast genome and identification of putative quadruplet anticodons in chloroplast tRNAs.Scientific reports · 2023Article
- Plastomes ofInternational journal of molecular sciences · 2022Article
- Article
- tRNA derived small RNAs-Small players with big roles.Frontiers in genetics · 2022Review
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Authors and funding
7 authors at 3 institutions in 1 country.
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Abstract
backgroundChloroplast transfer RNAs (tRNAs) can participate in various vital processes. Gymnosperms have important ecological and economic value, and they are the dominant species in forest ecosystems in the Northern Hemisphere. However, the evolution and structural changes in chloroplast tRNAs in gymnosperms remain largely unclear.
resultsIn this study, we determined the nucleotide evolution, phylogenetic relationships, and structural variations in 1779 chloroplast tRNAs in gymnosperms. The numbers and types of tRNA genes present in the chloroplast genomes of different gymnosperms did not differ greatly, where the average number of tRNAs was 33 and the frequencies of occurrence for various types of tRNAs were generally consistent. Nearly half of the anticodons were absent. Molecular sequence variation analysis identified the conserved secondary structures of tRNAs. About a quarter of the tRNA genes were found to contain precoded 3' CCA tails. A few tRNAs have undergone novel structural changes that are closely related to their minimum free energy, and these structural changes affect the stability of the tRNAs. Phylogenetic analysis showed that tRNAs have evolved from multiple common ancestors. The transition rate was higher than the transversion rate in gymnosperm chloroplast tRNAs. More loss events than duplication events have occurred in gymnosperm chloroplast tRNAs during their evolutionary process.
conclusionsThese findings provide novel insights into the molecular evolution and biological characteristics of chloroplast tRNAs in gymnosperms.
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