Bioscience, Biotechnology, and Biochemistry
Online ISSN : 1347-6947
Print ISSN : 0916-8451
Cloning of Purine Nucleoside Phosphorylase II Gene from Bacillus stearothermophilus TH 6-2 and Characterization of Its Gene Product
Tomoki HAMAMOTOToshitada NOGUCHIYuichiro MIDORIKAWA
Author information
JOURNAL FREE ACCESS

1997 Volume 61 Issue 2 Pages 276-280

Details
Abstract

Bacillus stearothermophilus TH 6-2 has two kinds of purine nucleoside phosphorylases (Pu-NPases). The type I enzyme (Pu-NPase I) is a functional and structural homolog of eukaryotic purine nucleoside phosphorylases that catalyze the phosphorolysis of inosine, guanosine, and their derivatives. The type II enzyme (Pu-NPase II) is a minor enzyme that efficiently phosphorolyzes adenosine and its derivatives rather than other purine nucleosides like Escherichia coli Pu-NPase. The gene coding for Pu-NPase II (punBgene) has been cloned and sequenced from TH 6-2 strain. The deduced amino acid sequence of Pu-NPasce II shared 54% identity with that of E. coli enzyme, while it had no significant homology to that of Pu-NPase I or eukaryotic enzymes. By producing the Pu-NPase II in E. coli cells, the Pu-NPase II has been purified and characterized.

Information related to the author

This article cannot obtain the latest cited-by information.

© Japan Society for Bioscience, Biotechnology, and Agrochemistry
Previous article Next article
feedback
Top