Postsynthetic modifications are widespread in genetic regulation. Trm9-mediated modification of the anticodon wobble base of specific tRNAs modulates expression of DNA damage response mRNAs in which cognate codons are unusually overrepresented. Thus, modification-dependent tRNA decoding activity is keyed to codon use in a genetic program.
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Maraia, R., Blewett, N. & Bayfield, M. It's a mod mod tRNA world. Nat Chem Biol 4, 162–164 (2008). https://doi.org/10.1038/nchembio0308-162
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DOI: https://doi.org/10.1038/nchembio0308-162