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REVIEW: Inhibition of Enzymes of Polyamine Biosynthesis by Substrate-Like O-Substituted Hydroxylamines

A. R. Khomutov

Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, ul. Vavilova 32, Moscow, 119991 Russia; fax: (095) 135-1405; E-mail: alexkhom@genome.eimb.relarn.ru

Received May 23, 2002
The biogenic amines spermine, spermidine, and putrescine are essential factors of cell growth and differentiation. To inhibit pyridoxal-5´-phosphate dependent ornithine decarboxylase and pyruvate dependent S-adenosylmethionine decarboxylase, key enzymes of polyamine biosynthesis, a system of substrate-like O-substituted hydroxylamines is suggested. The best of these compounds were active at nanomolar concentrations. High potency and specificity of this type of inhibitors are discussed in terms of structural similarity of E-I and E-S complexes.
KEY WORDS: polyamines, spermine, spermidine, O-substituted hydroxylamines, S-adenosylmethionine decarboxylase, ornithine decarboxylase