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The specificity of yeast low-Km cyclic AMP phosphodiesterase towards free bivalent metal ions and the diastereoisomers of cyclic adenosine phosphorothioate.

Authors
  • Suoranta, K
  • Londesborough, J
Type
Published Article
Journal
The Biochemical journal
Publication Date
Mar 15, 1985
Volume
226
Issue
3
Pages
897–900
Identifiers
PMID: 2985052
Source
Medline
License
Unknown

Abstract

The relative activity of a zinc-containing cyclic AMP phosphodiesterase towards the (Sp)- compared with the (Rp)-diastereoisomer of cyclic adensine phosphorothioate varied with the identity of the free bivalent metal ion from more than 35 to 0.074 along the series Mg2+ greater than Mn2+ greater than Co2+ greater than Zn2+ greater than Cd2+, showing that this ion, and not the tightly bound zinc, bonds to the phosphorothioate moiety of the substrate.

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