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. 1970 May;1(5):446–454. doi: 10.1128/iai.1.5.446-454.1970

Interconversion of Purine Mononucleotides in Pasteurella pestis1

R R Brubaker a
PMCID: PMC415922  PMID: 16557756

Abstract

Included among the five established determinants of virulence in Pasteurella pestis are the abilities of cells to accomplish the de novo biosynthesis of purines and to grow as dark pigmented (P+) colonies on a solid synthetic medium containing hemin. P+ isolates of P. pestis strain KIM-10 (mouse intraperitoneal ld50 < 10 cells) failed to convert exogenous guanine-8-14C to adenine residues of ribonucleic acid (RNA) when cultivated in a minimal medium which favored the pigmentation reaction. This conversion occurred in P+ cells grown in an enriched medium which did not support the pigmentation reaction and was observed in P− mutants cultivated in both types of media. Both P+ and P− isolates converted exogenous adenine-8-14C but not adenine-2-14C at a significant rate to guanosine residues of RNA when grown under a variety of conditions. This difference appeared to reflect a deficiency of adenine deaminase. The mouse intraperitoneal ld50 of purine-auxotrophs was about 102 cells when the metabolic block occurred prior to the de novo formation of inosine monophosphate (IMP). In contrast, the corresponding value for a mutant blocked between IMP and guanine monophosphate was > 107 cells in mice and > 108 cells in guinea pigs.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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