Phosphoribosylpyrophosphate (PRPP)-less mutants of Escherichia coli.

@article{HoveJensen1989PhosphoribosylpyrophosphateM,
  title={Phosphoribosylpyrophosphate (PRPP)-less mutants of Escherichia coli.},
  author={Bjarne Hove-Jensen},
  journal={Molecular microbiology},
  year={1989},
  volume={3 11},
  pages={1487-92}
}
A DNA fragment encoding kanamycin resistance was inserted in vitro into a plasmid-borne prs gene encoding phosphoribosylpyrophosphate synthetase of Escherichia coli. The resulting plasmids were subsequently transferred to the chromosome by homologous recombination and the haploid strains prs-3::KanR and prs-4::KanR were obtained. These strains were fully viable, but required guanosine, uridine, histidine, tryptophan and nicotinamide mononucleotide. There was no phosphoribosylpyrophosphate… CONTINUE READING
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