Abstract
ABSTRACTThe influence of phenol concentration on the activity of the aryl-degrading enzymes by Bacillus laterosporus BT-271 (BT-271) was studied. The indicated dependence was followed up under conditions when phenol was a sole carbon and energy source and in the presence of trivial substrates, such as succinate and glucose. Activity of all studied oxygenases of phenol catabolism increases along with rising its concentration from 1.06 to 7.98 mmol—for catechol 1,2-dioxygenase (C12DO) - 90 times, for phenol 2-monooxygenase - 2.5 times, for catechol 2,3-dioxygenase (C23DO) - 2 times, and for protocatechuate 3,4-dioxygenase (P34DO) - 26 times. Succinate and glucose decreased the oxygenases activities in the range of 86–99%. In the absence of phenol inductor a basic level of catechol 1,2-dioxygenase was established, which was synthesized constitutively. A basic role for the great adaptive possibilities of B. laterosporus BT-271 for detoxication of high concentrations to the inductive mechanisms for biosynthesi...
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