| Autor: |
Kharchenko OV, Kharitonenko AI, Vovk AI, Kukhar' VP, Babiĭ LV, Khil'chevskiĭ AN, Mel'nik AK |
| Jazyk: |
ruština |
| Zdroj: |
Ukrains'kyi biokhimichnyi zhurnal (1999 ) [Ukr Biokhim Zh (1999)] 2005 Jan-Feb; Vol. 77 (1), pp. 52-7. |
| Abstrakt: |
The inhibiting effects of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and its 4-substituted derivatives in reactions of linoleyl acid or linoleyl alcohol oxidation catalyzed by potato tuber 5-lipoxygenase were investigated. Inhibiting properties of stable nitroxyl radicals in presence of lubrol and SDS were reduced at the transition from TEMPO to 4-hydroxy-TEMPO or 4-amino-TEMPO and increased at use of adamantane-1-carboxylic or 3-methyladamantane-1-carboxylic acid 1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl esters. Enzyme activity at saturating concentrations of inhibitor was not suppressed completely, and decreased up to the certain level determined by the substrate nature. The dependence of partial inhibition efficiency on rotational correlation time of stable nitroxides in model micellar systems were analysed. It was supposed that 5-lipoxygenase inhibition includes the interaction of hydrophobic nitroxide with radical intermediate formed in enzymatic process. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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