A dual role of human tRNA methyltransferase hTrmt13 in regulating translation and transcription.
A dual role of human tRNA methyltransferase hTrmt13 in regulating translation and transcription.
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人 tRNA 甲基转移酶 hTrmt13 在调节翻译和转录中的双重作用。
DOI:
10.15252/embj.2021108544
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发表时间:
2022-03-15
期刊:
影响因子:
--
通讯作者:
Liu RJ
中科院分区:
文献类型:
--
作者:
Li H;Dong H;Xu B;Xiong QP;Li CT;Yang WQ;Li J;Huang ZX;Zeng QY;Wang ED;Liu RJ
Since numerous RNAs and RBPs prevalently localize to active chromatin regions, many RNA‐binding proteins (RBPs) may be potential transcriptional regulators. RBPs are generally thought to regulate transcription via noncoding RNAs. Here, we describe a distinct, dual mechanism of transcriptional regulation by the previously uncharacterized tRNA‐modifying enzyme, hTrmt13. On one hand, hTrmt13 acts in the cytoplasm to catalyze 2'‐O‐methylation of tRNAs, thus regulating translation in a manner depending on its tRNA‐modification activity. On the other hand, nucleus‐localized hTrmt13 directly binds DNA as a transcriptional co‐activator of key epithelial–mesenchymal transition factors, thereby promoting cell migration independent of tRNA‐modification activity. These dual functions of hTrmt13 are mutually exclusive, as it can bind either DNA or tRNA through its CHHC zinc finger domain. Finally, we find that hTrmt13 expression is tightly associated with poor prognosis and survival in diverse cancer patients. Our discovery of the noncatalytic roles of an RNA‐modifying enzyme provides a new perspective for understanding epitranscriptomic regulation. hTrmt13 regulates gene expression via translation in the cytoplasm, but also by acting in a non‐catalytic manner as a transcriptional coactivator.
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影响因子:
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作者:
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通讯作者:
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16.6
作者:
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通讯作者:
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