Reaction of ferricytochrome c with the iron nitrosyl complex {Fe2[S(CH2)2NH3]2(NO)4}SO4 • 2.5H2O

被引：0
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作者：
N. A. Sanina
L. A. Syrtsova
N. I. Shkondina
T. N. Rudneva
A. I. Kotel’nikov
S. M. Aldoshin
机构：
[1] Russian Academy of Sciences,Institute of Problems of Chemical Physics
来源：
Russian Chemical Bulletin | 2010年 / 59卷
关键词：
Key words; cytochrome ; ferricytochrome ; iron nitrosyl complexes; NO donors; cytochrome nitrosyl complexes;
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摘要：
By an example of cysteamine iron nitrosyl complex {Fe2[S(CH2)2NH3]2(NO)4}SO4 • 2.5H2O (CAC) it was shown for the first time that the NO donor hydrolysis in the presence of ferricytochrome c (cyt c3+) affords the iron nitrosyl complex NO—cyt c3+. It was found that cyt c3+ can serve as a depot for NO evolved during the hydrolysis of CAC. In the presence of CAC, the rate of NO—cyt c3+ complex decomposition to NO and cyt c3+ depends on the molar ratio [cyt c3+]: [CAC] and at [cyt c3+]: [CAC] = 0.3 it was found to be lower than that in decomposition of CAC in the absence of cyt c3+. As a result, the total NO evolving process becomes 5.6 times more prolonged. The number of NO groups evolved from CAC can be determined by the reaction of CAC with cyt c3+ in the presence of ferricyanide: at most one NO group is evolved to a solution in the spontaneous hydrolysis of CAC (pH 7.0), and no less than three of them are evolved from oxidized CAC.
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页码：1565 / 1571
页数：6
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