Phenotypic conversion of drug-resistant bacteria to drug sensitivity

Cecilia Guerrier-Takada, Reza Salavati, Sidney Altman

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


Plasmids that contain synthetic genes coding for small oligoribonucleotides called external guide sequences (EGSs) have been introduced into strains of Escherichia coli harboring antibiotic resistance genes. The EGSs direct RNase P to cleave the mRNAs transcribed from these genes thereby converting the phenotype of drug-resistant cells to drug sensitivity. Increasing the EGS-to-target mRNA ratio by changing gene copy number or the number of EGSs complementary to different target sites enhances the efficiency of the conversion process. We demonstrate a general method for the efficient phenotypic conversion of drug-resistant bacterial cultures.

Original languageEnglish (US)
Pages (from-to)8468-8472
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number16
StatePublished - Aug 5 1997
Externally publishedYes


  • Bacterial drug resistance
  • External guide sequences
  • RNase P

ASJC Scopus subject areas

  • General


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