title: Immucillin-H, a purine nucleoside phosphorylase transition state analog, causes non-lethal attenuation of growth in Staphylococcus aureus.
abstract: Purine nucleoside phosphorylase (PNP; EC: 2.4.2.1) is a key enzyme involved in the purine salvage pathway. A recent bioinformatic study by Yadav, P. K. et al. (Bioinformation 2012, 8(14), 664-672) reports PNP as an essential enzyme and potential drug target in community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA). We conducted an analysis using the methodology outlined by the authors, but were unable to identify PNP as an essential gene product in CA-MRSA. In addition, the treatment of Staphylococcus aureus cultures with immucillin-H, a powerful inhibitor of PNP, resulted in the non-lethal attenuation of growth, suggesting that PNP activity is not essential for cell viability.
authors: Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461.
authors: Christopher F
authors: CF
authors: Stratton
authors: Vern L
authors: VL
authors: Schramm
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