Enzymatic characteristics of two novel Myxococcus xanthus enzymes, PdeA and PdeB, displaying 3′,5′- and 2′,3′-cAMP phosphodiesterase, and phosphatase activities

Yoshio Kimura, Nozomi Okazaki, Kaoru Takegawa

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Myxococcus xanthus PdeA and PdeB, enzymes homologous to class III 3′,5′-cyclic nucleotide phosphodiesterases, hydrolyzed 3′,5′- and 2′,3′-cyclic AMP (cAMP) to adenosine, and also demonstrated phosphatase activity toward nucleoside 5′-tri-, 5′-di-, 5′- and 3′-monophosphates with highest activities for nucleoside 5′-monophosphates. The substrate specificities of PdeA and PdeB show no similarity to that of any known cNMP phosphodiesterase, nucleotidase, or phosphatase. The enzyme activities of PdeA and PdeB were stimulated by 50 μM Mn2+ or Co2+. The Km values of PdeA and PdeB for 3′,5′-cAMP, 2′,3′-cAMP, 5′-ATP, and 5′-AMP were in the low micromolar range (1.4-12.5 μM).

Original languageEnglish
Pages (from-to)443-448
Number of pages6
JournalFEBS Letters
Issue number2
Publication statusPublished - Jan 22 2009


All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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