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tRNAscan-SE 2.0: improved detection and functional classification of transfer RNA genes

Open access
Chan, Patricia P, Lin, Brian Y, Mak, Allysia J, Lowe, Todd M·2021·Nucleic Acids Research

Abstract

tRNAscan-SE has been widely used for transfer RNA (tRNA) gene prediction for over twenty years, developed just as the first genomes were decoded. With the massive increase in quantity and phylogenetic diversity of genomes, the accurate detection and functional prediction of tRNAs has become more challenging. Utilizing a vastly larger training set, we created nearly one hundred specialized isotype- and clade-specific models, greatly improving tRNAscan-SE’s ability to identify and classify both typical and atypical tRNAs. We employ a new comparative multi-model strategy where predicted tRNAs are scored against a full set of isotype-specific covariance models, allowing functional prediction based on both the anticodon and the highest-scoring isotype model. Comparative model scoring has also enhanced the program's ability to detect tRNA-derived SINEs and other likely pseudogenes. For the first time, tRNAscan-SE also includes fast and highly accurate detection of mitochondrial tRNAs using newly developed models. Overall, tRNA detection sensitivity and specificity is improved for all isotypes, particularly those utilizing specialized models for selenocysteine and the three subtypes of tRNA genes encoding a CAU anticodon. These enhancements will provide researchers with more accurate and detailed tRNA annotation for a wider variety of tRNAs, and may direct attention to tRNAs with novel traits.

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Metadata

Authors
Chan, P. P., Lin, B. Y., Mak, A. J., & Lowe, T. M.
Venue
Nucleic Acids Research
Published
2021-08-20
Volume
49
Issue
16
Pages
9077-9096
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W3195010157
Cited by
1,925
References
100
FWCI
65.48
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: tRNAscan-SE 2.0: improved detection and functional classification of transfer RNA genes. https://app.cochat.ai/papers/10.1093/nar/gkab688
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Chan, P. P., Lin, B. Y., Mak, A. J., & Lowe, T. M. (2021). tRNAscan-SE 2.0: improved detection and functional classification of transfer RNA genes. Nucleic Acids Research. https://doi.org/10.1093/nar/gkab688

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