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. 2024:2851:15-21.
doi: 10.1007/978-1-0716-4096-8_2.

Introduction of Spontaneous Mutations Using Streptomycin as a Method for Lactic Acid Bacteria Breeding

Fu Namai  1   2 , Keita Nishiyama  3   4 , Haruki Kitazawa  3   4 , Takeshi Shimosato  5   6
Affiliations

Introduction of Spontaneous Mutations Using Streptomycin as a Method for Lactic Acid Bacteria Breeding

Fu Namai et al. Methods Mol Biol. 2024.

Abstract

The chapter presents a technique for inducing spontaneous mutations using antibiotics that target microbial ribosomes and/or RNA polymerase, employed in bacterial breeding. In contrast to UV-based mutagenesis, this method allows control of the mutation sites, specifically targeting the rpsL gene. The outlined methodology introduces spontaneous mutations using streptomycin in Lacticaseibacillus rhamnosus GG ATCC 53103 (LGG), a widely studied lactic acid bacterium. Streptomycin has been shown to induce mutations in the rpsL gene, particularly altering lysine residues at position 56 or 101. It has also been reported to affect bacterial morphology and surface protein composition, thereby enhancing adhesion to human mucin.

Keywords: Drug-resistance mutations; Microbial breeding; Ribosome engineering; Streptomycin; rpsL gene.

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