Structure-Based Design of Inhibitors of Purine Nucleoside Phosphorylase. 3. 9-Arylmethyl Derivatives of 9-Deazaguanine Substituted on the Methylene Group

Academic Article


  • X-ray crystallography and computer-assisted molecular modeling (CAMM) studies aided in the design of a potent series of mammalian purine nucleoside Phosphorylase (PNP) inhibitors. Enhanced potency was achieved by designing substituted 9-(arylmethyl)-9-deazaguanine analogs that interact favorably with all three of the binding subsites of the PNP active site, namely the purine binding site, the hydrophobic pocket, and the phosphate binding site. The most potent PNP inhibitor prepared during our investigation, (S)-9-[1-(3-chlorophenyl)-2-carboxyethyl]-9-deazaguanine(18b), was shown to have an IC50 of 6 nM, whereas the corresponding (R)-isomer was 30-fold less potent. © 1993, American Chemical Society. All rights reserved.
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    Author List

  • Erion MD; Niwas S; Rose JD; Ananthan S; Allen M; Secrist JA; Babu YS; Bugg CE; Guida WC; Ealick SE
  • Start Page

  • 3771
  • End Page

  • 3783
  • Volume

  • 36
  • Issue

  • 24