PURIFICATION AND PROPERTIES OF THE 2-KETOGLUCONOKINASE OF LEUCONOSTOC MESENTEROIDES
- 1 June 1959
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Microbiology
- Vol. 5 (3), 277-291
- https://doi.org/10.1139/m59-033
Abstract
A specific and adaptive 2-keto-D-gluconokinase has been isolated from cells of Leuconostoc mesenteroides grown on 2-keto-D-gluconate. The enzyme, purified 138-fold, has an optimum pH of 7.7, is most stable between pH 6.0 and 8.0, and is quickly inactivated at temperatures above 40 °C. Magnesium chloride is required for activity. ATP, ITP, and GTP served as phosphate donors but ADP and UTP were inactive. Whereas EDTA and glycine stabilized the enzyme, p-chloromercuribenzoate, hydroxylamine, copper acetate, mercury acetate, and sodium fluoride were inhibitory. The product of the enzymatic reaction was isolated and characterized as 2-keto-6-phospho-D-gluconate.Keywords
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