L. D. Varbanets¹, Е. V. Mаtselyukh¹, Е. V. Gudzenko¹,
N. V. Bоrzоvа¹, I. I. Sеifullina², G. N. Khitrich²

¹Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Kiev;
e-mail: varbanets@serv.imv.kiev.ua;
²Mechnikov Оdеssa National University, Ukraine

The influence of a number of coordinative compounds of zinc with N-substituted­ thiocarbamoil-N′-pentamethylensulfenamides on activity of elastase, α-L-rhamnosidase and α-galactosidases evidence for a possibility of their usage as stimulators or inhibitors of enzymes tested have been studied. It was shown that all the compounds in concentration of 0.1 and 0.01% inhibi­ted by 90–100% Bacillus thuringiensis 27-88Els⁺ elastase activity. [Zn(L₂)Br₂], [Zn(L₁)(NCS)₂] and [Zn(L₃)(NCS)₂] at 20 h exposition activated Cryptococcus albidus 1001 α-L-rhamnosidase activity. The rest of compounds influenced it on the control level or inhibited it by 7–23%. The obtained results testify that essential role is not played by separate fragments (L-ligand and anions), but by molecules of zinc complexes as a whole. All the studied complexes, exept for [Zn(L₃)(NCS)₂], induced α-L-rhamnosidase activity of Еupenicillium erubescens 248 (7 to 60%). All zinc compounds (concentration 0.01%, exposition time – 60 min) influenced at the control level Aspergillus niger and Clado­sporium cladosporioides α-galactosidases activity, however inhibited (up to 20%) activity of Penicillium canescens α-galactosidase. The increasing of exposition time of the compounds tested with enzymes up to 20 h testify to selective action of separate compounds on enzymes tested. The data obtained prove, that the character of interaction of zinc complexes is changed depending on the enzyme tested and its strain-producer.

Keywords: Aspergillus niger, Bacillus thuringiensis 27-88Els(+) elastase, Cladosporium cladosporioides, Cryptococcus albidus 1001 and Еupenicillium erubescens 248 α-rhamnosidase, Penicillium canescens α-galactosidases, zinc coordinative compounds