Abstract
The effects of two alkylresorcinols, namely, methylresorcinol (MR) and hexylresorcinol (HR), which are chemical analogues of the natural anabiosis factors of some bacteria, on the catalytic activity of β-amylase has been investigated. When water-soluble potato starch is used as a substrate, MR in a concentration ranging from 0.8 to 12.9 mmol/L raises the activity of β-amylase to 170%. HR at a concentration ranging from 0.05 to 0.35 mmol/L stimulates a weak increase in the activity of β-amylase to 115%. A further increase in the concentration (0.75 mmol/L) leads to inhibition by 50%. The interaction of MR with β-amylase allows one to increase the general yield of the hydrolysis products of potato and malt starch by 1.5 to 1.6 times, to enhance the rate of hydrolysis by 4 to 5 times, and to extend the temperature and pH ranges of catalysis. Non-competitive activation in the presence of MR and non-competitive inhibition in the presence of HR are observed upon determining the kinetic parameters of the starch hydrolysis by β-amylase modified with alkylresorcinols.
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