title: [Effect of Cu2+ on synthesis of biosurfactants of Acinetobacter calcoaceticus IMV B-7241 and Rhodococcus erythropolis IMV Ac-5017].
abstract: Synthesis of biosurfactants (surface-active substances, SAS) was investigated under the conditions of growth of Rhodococcus erythropolis IMV Ac-5017 and Acinetobacter calcoaceticus IMV B-7241 on hydrophobic (n-hexadecane, liquid paraffins, sunflower oil) and hydrophilic (ethanol) substrates depending on concentration (0.01-0.5 mM) and time of copper cations introduction in the medium. It is established that Cu2+ addition in the exponential phase of growth of the strains IMV B-7241 and IMV Ac-5017 on all studied substrates was accompanied by the increase of conventional concentration of SAS by 25-140% as compared with the indices in the medium without copper cations. Maximum synthesis intensification of SAS of A. calcoaceticus IMV B-7241 and R. erythropolis IMV Ac-5017 was observed in the case of Cu2+ introduction in the medium with hydrocarbons. The increase of SAS synthesis in the presence of copper cations is determined by their activating effect on activity of alkane hydroxylase of the both strains, as well as 4-nitroso-N,N-dimethylaniline-dependent alcohol dehydrogenase and enzymes of biosynthesis of surface active glyco-(phosphoenolpyruvate-synthetase) and aminolipids (NADP(+)-dependent glutamate dehydrogenase) in A. calcoaceticus IMV B-7241.
authors.forename: T P
authors.initials: TP
authors.lastname: Pirog
authors.forename: A D
authors.initials: AD
authors.lastname: Konon
authors.forename: A P
authors.initials: AP
authors.lastname: Sofilkanich
authors.forename: T A
authors.initials: TA
authors.lastname: Shevchuk
authors.forename: S A
authors.initials: SA
authors.lastname: Parfeniuk
mesh_terms: D016954:Acinetobacter calcoaceticus / Q000187:drug effects / Q000378:metabolism*; D000426:Alcohol Dehydrogenase / Q000378:metabolism; D000473:Alkanes / Q000378:metabolism; D002413:Cations, Divalent; D003300:Copper / Q000378:metabolism* / Q000494:pharmacology; D003470:Culture Media; D042926:Cytochrome P-450 CYP4A / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism; D018086:Glutamate Dehydrogenase (NADP+); D008899:Mineral Oil / Q000378:metabolism; D017866:Phosphotransferases (Paired Acceptors); D010938:Plant Oils / Q000378:metabolism; D012240:Rhodococcus / Q000187:drug effects / Q000378:metabolism*; D000074242:Sunflower Oil; D013501:Surface-Active Agents / Q000378:metabolism*
chemical_list: D000473:Alkanes; D002413:Cations, Divalent; D003470:Culture Media; D010938:Plant Oils; D000074242:Sunflower Oil; D013501:Surface-Active Agents; D000431:Ethanol; D003300:Copper; D008899:Mineral Oil; D000426:Alcohol Dehydrogenase; C105552:alcohol dehydrogenase IV; D042926:Cytochrome P-450 CYP4A; D018086:Glutamate Dehydrogenase (NADP+); D017866:Phosphotransferases (Paired Acceptors); C022509:pyruvate, water dikinase; C007932:n-hexadecane