Transfer RNA halves are found as nicked tRNAs in cells: evidence that nicked tRNAs regulate expression of an RNA repair operon.
Transfer RNA halves are found as nicked tRNAs in cells: evidence that nicked tRNAs regulate expression of an RNA repair operon.
复制标题
在细胞中发现转移RNA的两半是刻度的TRNA:刻度TRNA调节RNA修复操纵子的表达的证据。
DOI:
10.1261/rna.079575.122
复制
发表时间:
2023-05
期刊:
影响因子:
4.5
通讯作者:
Wolin, Sandra L.
中科院分区:
文献类型:
--
作者:
Chen, Xinguo;Wolin, Sandra L.
Transfer RNA fragments are proposed to regulate numerous processes in eukaryotes, including translation inhibition, epigenetic inheritance, and cancer. In the bacterium Salmonella enterica serovar Typhimurium, 5′ tRNA halves ending in 2′,3′ cyclic phosphate are proposed to bind the RtcR transcriptional activator, resulting in transcription of an RNA repair operon. However, since 5′ and 3′ tRNA halves can remain base paired after cleavage, the 5′ tRNA halves could potentially bind RtcR as nicked tRNAs. Here we report that nicked tRNAs are ligands for RtcR. By isolating RNA from bacteria under conditions that preserve base pairing, we show that many tRNA halves are in the form of nicked tRNAs. Using a circularly permuted tRNA that mimics a nicked tRNA, we show that nicked tRNA ending in 2′,3′ cyclic phosphate is a better ligand for RtcR than the corresponding 5′ tRNA half. In human cells, we show that some tRNA halves similarly remain base paired as nicked tRNAs following cleavage by anticodon nucleases. Our work supports a role for the RNA repair operon in repairing nicked tRNAs and has implications for the functions proposed for tRNA fragments in eukaryotes.
登录
查看更多内容
影响因子:
64.5
作者:
Chen X;Taylor DW;Fowler CC;Galan JE;Wang HW;Wolin SL
通讯作者:
Wolin SL
影响因子:
64.5
作者:
Goodarzi H;Liu X;Nguyen HC;Zhang S;Fish L;Tavazoie SF
通讯作者:
Tavazoie SF
DOI:
10.1073/pnas.2216330120
发表时间:
2023-01-24
影响因子:
11.1
作者:
Costa, Bruno;Li Calzi, Marco;Castellano, Mauricio;Blanco, Valentina;Cuevasanta, Ernesto;Litvan, Irene;Ivanov, Pavel;Witwer, Kenneth;Cayota, Alfonso;Tosar, Juan Pablo
通讯作者:
Tosar, Juan Pablo
影响因子:
14.8
作者:
Honda S;Morichika K;Kirino Y
通讯作者:
Kirino Y
DOI:
10.1073/pnas.71.5.1857
发表时间:
1974-01-01
影响因子:
11.1
作者:
CORTESE, R;LANDSBER.R;AMES, BN
通讯作者:
AMES, BN