Dynamic queuosine changes in tRNA couple nutrient levels to codon choice in Trypanosoma brucei.
Dynamic queuosine changes in tRNA couple nutrient levels to codon choice in Trypanosoma brucei.
复制标题
布氏锥虫tRNA营养水平与密码子选择的动态队列变化。
DOI:
10.1093/nar/gkab1204
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发表时间:
2021-12-16
影响因子:
14.9
通讯作者:
Alfonzo JD
中科院分区:
文献类型:
--
作者:
Dixit S;Kessler AC;Henderson J;Pan X;Zhao R;D'Almeida GS;Kulkarni S;Rubio MAT;Hegedűsová E;Ross RL;Limbach PA;Green BD;Paris Z;Alfonzo JD
Every type of nucleic acid in cells undergoes programmed chemical post-transcriptional modification. Generally, modification enzymes use substrates derived from intracellular metabolism, one exception is queuine (q)/queuosine (Q), which eukaryotes obtain from their environment; made by bacteria and ultimately taken into eukaryotic cells via currently unknown transport systems. Here, we use a combination of molecular, cell biology and biophysical approaches to show that in Trypanosoma brucei tRNA Q levels change dynamically in response to concentration variations of a sub-set of amino acids in the growth media. Most significant were variations in tyrosine, which at low levels lead to increased Q content for all the natural tRNAs substrates of tRNA-guanine transglycosylase (TGT). Such increase results from longer nuclear dwell time aided by retrograde transport following cytoplasmic splicing. In turn high tyrosine levels lead to rapid decrease in Q content. Importantly, the dynamic changes in Q content of tRNAs have negligible effects on global translation or growth rate but, at least, in the case of tRNATyr it affected codon choice. These observations have implications for the occurrence of other tunable modifications important for ‘normal’ growth, while connecting the intracellular localization of modification enzymes, metabolites and tRNAs to codon selection and implicitly translational output.
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影响因子:
3.3
作者:
Damon JR;Pincus D;Ploegh HL
通讯作者:
Ploegh HL
影响因子:
4.1
作者:
Dedon, Peter C.;Begley, Thomas J.
通讯作者:
Begley, Thomas J.
DOI:
10.3390/pathogens7020036
发表时间:
2018-04-01
期刊:
Pathogens (Basel, Switzerland)
影响因子:
--
作者:
Marchese L;Nascimento JF;Damasceno FS;Bringaud F;Michels PAM;Silber AM
通讯作者:
Silber AM
影响因子:
14.9
作者:
Müller M;Hartmann M;Schuster I;Bender S;Thüring KL;Helm M;Katze JR;Nellen W;Lyko F;Ehrenhofer-Murray AE
通讯作者:
Ehrenhofer-Murray AE
影响因子:
7.3
作者:
Jackman, Jane E.;Alfonzo, Juan D.
通讯作者:
Alfonzo, Juan D.