ArticleScientific reports2024
Systematic analysis of tRNA transcription unit deletions in E. coli reveals insights into tRNA gene essentiality and cellular adaptation.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- A Novel Translational Reprogramming of the Insertion Sequence IS1239 by 1-bp Deletion Resulted in Polymorphism of C-Terminal Amino Acid Sequences in the Pathogenic BacteriumJournal of microbiology and biotechnology · 2026Article
- Genomic factors contributing to the resilience of Salmonella enterica on ready-to-eat muskmelon.Food microbiology · 2026Article
- tRNA-Mediated Plasmid Stabilization for Antibiotic-Free Applications inACS synthetic biology · 2026Article
- Coupling tRNAGly gene redundancy with staphylococcal cell wall integrity, antibiotic susceptibility, and virulence potential.Nucleic acids research · 2025Article
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5 authors.
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Abstract
Transfer ribonucleic acids (tRNAs) are essential for protein synthesis, decoding mRNA sequences into amino acids. In E. coli K-12 MG1655, 86 tRNA genes are organized in 43 transcription units (TUs) and the essentiality of individual tRNA TUs in bacterial physiology remains unclear. To address this, we systematically generated 43 E. coli tRNA deletion strains in which each tRNA TU was replaced by a kanamycin resistance gene. We found that 33 TUs are not essential for survival, while 10 are essential and require the corresponding TU to be provided on plasmid. The analysis revealed E. coli's tolerance to alterations in tRNA gene copy number and the loss of non-essential tRNAs, as most strains exhibited minimal to no growth differences under various conditions compared to the parental strain. However, deletions metZWV, alaWX and valVW led to significant growth defects under specific conditions. RNA-seq analysis of ∆alaWX and ∆valVW revealed upregulation of genes involved in translation and pilus assembly. Our results provide valuable insights into tRNA dynamics and the cellular response to tRNA TU deletions, paving the way for deeper understanding of tRNA pool complexity.
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