1887

Abstract

Summary: The 2':3'-cyclic nucleotide phosphodiesterase:3'-nucleotidase of was purified from a periplasmic preparation by affinity chromatographic techniques. The enzyme-catalysed hydrolysis of 2': 3'-cyclic AMP to adenosine without accumulation of the intermediate substrate 3'-AMP was demonstrated by high performance liquid chromatography. Competitive inhibition of the enzyme by a variety of nucleosides and mononucleotides indicated the presence of either purine or pyrimidine bases to be essential for selective interactions with the enzyme, and confirmed the need for a 3'-position phosphate for the functioning of mononucleotides as substrates for the enzyme. The enzyme had a molecular weight of 79000, was stable at low temperatures and was thermally denatured at temperatures above 50°C.

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/content/journal/micro/10.1099/00221287-131-8-2041
1985-08-01
2021-05-17
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