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Updated: Jan 26, 2026

In vitro tRNA Methylation Assay with the Entamoeba histolytica DNA and tRNA Methyltransferase Dnmt2 Ehmeth Enzyme
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In vitro tRNA Methylation Assay with the Entamoeba histolytica DNA and tRNA Methyltransferase Dnmt2 Ehmeth Enzyme

Published on: October 19, 2010

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tRNA Methylation Is a Global Determinant of Bacterial Multi-drug Resistance

Isao Masuda1, Ryuma Matsubara1, Thomas Christian1

  • 1Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.

Cell Systems
|April 15, 2019
PubMed

Insights

Modifying m1G37-tRNA methylation in Gram-negative bacteria disrupts membrane protein synthesis, increasing antibiotic susceptibility. This discovery offers a novel strategy to combat multi-drug resistance by targeting translation.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • Gram-negative bacteria possess a double-membrane envelope that confers intrinsic antibiotic resistance.
  • This barrier limits antibiotic entry and facilitates efflux pump activity, preventing therapeutic concentrations.
  • Previous attempts to overcome resistance by targeting individual membrane proteins have proven unsuccessful.

Purpose of the Study:

  • To investigate the role of m1G37-tRNA methylation in the synthesis of membrane proteins in Gram-negative bacteria.
  • To determine if modulating m1G37 levels can impact antibiotic resistance and persistence.
  • To explore codon engineering as a strategy to confer antibiotic resistance.

Main Methods:

  • Studied the impact of m1G37 levels on membrane protein synthesis in Escherichia coli and Salmonella.
  • Assessed bacterial sensitivity to various antibiotic classes following alterations in m1G37 levels.
  • Employed codon engineering on membrane-associated genes to evaluate its effect on translational dependence and resistance.

Main Results:

  • Decreased m1G37 levels impair bacterial membrane structure and increase susceptibility to multiple antibiotics.
  • Bacteria with reduced m1G37 levels are less capable of developing antibiotic resistance or persistence.
  • Codon engineering of specific genes can reduce reliance on m1G37 and confer antibiotic resistance.

Conclusions:

  • m1G37-tRNA methylation is a critical regulator of membrane protein synthesis and antibiotic resistance in Gram-negative bacteria.
  • Targeting tRNA methylation offers a promising avenue for developing new strategies against multi-drug resistant pathogens.
  • Codon optimization presents a potential method for engineering bacteria with enhanced antibiotic resilience.
Keywords:
TrmDdrug effluxm1G37-tRNAmembrane barrierpersistenceproline codonsresistancetRNAPro

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