Molecular basis of streptomycin resistance in Mycobacterium tuberculosis: alterations of the ribosomal protein S12 gene and point mutations within a functional 16S ribosomal RNA pseudoknot

Mol Microbiol. 1993 Sep;9(6):1239-46. doi: 10.1111/j.1365-2958.1993.tb01253.x.


Multidrug-resistant strains of Mycobacterium tuberculosis have resulted in several recent outbreaks. Recognition of drug resistance is important both for treatment and to prevent further transmission. Here we use molecular biology techniques to study the basis of streptomycin resistance in single and multidrug-resistant M. tuberculosis. We demonstrate that streptomycin resistance is associated with mutations implicated in ribosomal resistance. The mutations found either lead to amino acid changes in ribosomal protein S12 or alter the primary structure of the 16S rRNA. The 16S rRNA region mutated perturbs a pseudoknot structure in a region which has been linked to ribosomal S12 protein.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Base Sequence
  • Blotting, Southern
  • DNA Primers
  • DNA, Bacterial / analysis
  • DNA, Bacterial / genetics
  • Drug Resistance, Microbial / genetics*
  • Drug Resistance, Multiple / genetics*
  • Genes, Bacterial*
  • Molecular Sequence Data
  • Mutagenesis, Site-Directed
  • Mycobacterium tuberculosis / drug effects
  • Mycobacterium tuberculosis / genetics*
  • Mycobacterium tuberculosis / metabolism
  • Nucleic Acid Conformation
  • Point Mutation*
  • Polymerase Chain Reaction
  • RNA, Ribosomal, 16S / chemistry*
  • RNA, Ribosomal, 16S / genetics*
  • Ribosomal Proteins / genetics*
  • Ribosomes / drug effects
  • Ribosomes / metabolism
  • Streptomycin / toxicity*


  • DNA Primers
  • DNA, Bacterial
  • RNA, Ribosomal, 16S
  • Ribosomal Proteins
  • ribosomal protein S12
  • Streptomycin

Associated data

  • GENBANK/X70995