The Function of the 5-Hydroxymethyl Group of Lactose in Enzymatic Hydrolysis with beta-Galactosidase from E. coli.
摘要:
A series of 6-substituted methyl lactoside derivatives together with methyl allolactoside and (6S)-methyl [6-H-2]lactoside have been synthesized and characterized by NMR spectroscopy. All compounds were tested as substrates for the enzyme beta-galactosidase from E. coli using progress curve kinetic methology both in single-substrate and competition experiments. The results show that the hydrolysis of methyl lactoside to a large extent takes place through an intramolecular trans-glycosidation reaction via allolactoside. Furthermore, methyl 6-amino-6-deoxy-D-glucopyranoside proved to be an inhibitor for the enzymatic hydrolysis.
The Function of the 5-Hydroxymethyl Group of Lactose in Enzymatic Hydrolysis with beta-Galactosidase from E. coli.
摘要:
A series of 6-substituted methyl lactoside derivatives together with methyl allolactoside and (6S)-methyl [6-H-2]lactoside have been synthesized and characterized by NMR spectroscopy. All compounds were tested as substrates for the enzyme beta-galactosidase from E. coli using progress curve kinetic methology both in single-substrate and competition experiments. The results show that the hydrolysis of methyl lactoside to a large extent takes place through an intramolecular trans-glycosidation reaction via allolactoside. Furthermore, methyl 6-amino-6-deoxy-D-glucopyranoside proved to be an inhibitor for the enzymatic hydrolysis.