A new 5'-nucleotidase inhibitor, nucleoticidin. II. Physico-chemical properties and structure elucidation

A novel 5'-nucleotidase inhibitor, named nucleoticidin, was isolated from a fermentation broth of Pseudomonas sp. The molecular weight was estimated by gel filtration to be over 1,000,000. Nucleoticidin is composed of D-glucose and D-mannose at a molar ratio of 1.7 to 1.0. Combined analyses using chemical and physico-chemical methods, such as gas liquid chromatography and mass fragmentography, revealed that nucleoticidin has a structural unit with mannosyl residues at the terminal of a (1----4) linked D-glucosyl main chain with beta-configuration.