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Selective inhibition of metabolic enzymes by enzymatically synthesized D-glucal-6-phosphate
1Department of Chemistry and Biochemistry, University of Delaware, Newark 19716.
Bioorganic & Medicinal Chemistry
|July 1, 1994
Abstract:
Yeast hexokinase (EC 2.7.1.1) catalyzes the phosphorylation of D-glucal and methyl alpha- and beta-D-glucopyranosides at 1-5% of the rates of phosphorylation of D-glucose and 2-deoxy-D-glucose. Maltose, cellobiose, D-galactal and tetrahydropyran-2-methanol are not substrates of hexokinase. Enzymatically synthesized D-glucal-6-phosphate inhibits rabbit muscle phosphoglucose isomerase competitively (KI = 1.94 mM) and phosphoglucomutase noncompetitively (KI = 0.122 mM).