A new bacterial tRNA enhances antibiotic production in Streptomyces by circumventing inefficient wobble base-pairing.
A new bacterial tRNA enhances antibiotic production in Streptomyces by circumventing inefficient wobble base-pairing.
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DOI:
10.1093/nar/gkac502
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发表时间:
2022-07-08
影响因子:
14.9
通讯作者:
Liu, Guangxiu
中科院分区:
文献类型:
--
作者:
Chen, Ximing;Li, Shuyan;Zhang, Binglin;Sun, Haili;Wang, Jinxiu;Zhang, Wei;Meng, Wenbo;Chen, Tuo;Dyson, Paul;Liu, Guangxiu
We report the discovery and functional characterization of a new bacterial tRNA species. The tRNA-Asp-AUC, from a fast-growing desert streptomycete, decodes GAU codons. In the absence of queuosine tRNA anticodon modification in streptomycetes, the new tRNA circumvents inefficient wobble base-pairing during translation. The tRNA, which is constitutively expressed, greatly enhances synthesis of 4 different antibiotics in the model mesophilic species Streptomyces coelicolor, including the product of a so-called cryptic pathway, and increases yields of medically-important antibiotics in other species. This can be rationalised due to increased expression of both pleiotropic and pathway-specific transcriptional activators of antibiotic biosynthesis whose genes generally possess one or more GAT codons; the frequency of this codon in these gene sets is significantly higher than the average for streptomycete genes. In addition, the tRNA enhances production of cobalamin, a precursor of S-adenosyl methionine, itself an essential cofactor for synthesis of many antibiotics. The results establish a new paradigm of inefficient wobble base-pairing involving GAU codons as an evolved strategy to regulate gene expression and, in particular, antibiotic biosynthesis. Circumventing this by expression of the new cognate tRNA offers a generic strategy to increase antibiotic yields and to expand the repertoire of much-needed new bioactive metabolites produced by these valuable bacteria.
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影响因子:
--
作者:
Li L;Ma T;Liu Q;Huang Y;Hu C;Liao G
通讯作者:
Liao G
影响因子:
14.9
作者:
Torres AG;Piñeyro D;Rodríguez-Escribà M;Camacho N;Reina O;Saint-Léger A;Filonava L;Batlle E;Ribas de Pouplana L
通讯作者:
Ribas de Pouplana L
影响因子:
2.1
作者:
Flett, F;Mersinias, V;Smith, CP
通讯作者:
Smith, CP
影响因子:
2.8
作者:
Gottelt, Marco;Kol, Stefan;Takano, Eriko
通讯作者:
Takano, Eriko
影响因子:
3.6
作者:
Koshla, Oksana;Yushchuk, Oleksandr;Ostash, Bohdan
通讯作者:
Ostash, Bohdan