کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1173930 1491400 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectrophotometric activity microassay for pure and recombinant cytochrome P450-type nitric oxide reductase
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Spectrophotometric activity microassay for pure and recombinant cytochrome P450-type nitric oxide reductase
چکیده انگلیسی

Nitric oxide reductase (NOR) of the P450 oxidoreductase family accepts electrons directly from its cofactor, NADH, to reduce two nitric oxide (NO) molecules to one nitrous oxide molecule and water. The enzyme plays a key role in the removal of radical NO produced during respiratory metabolism, and applications in bioremediation and biocatalysis have been identified. However, a rapid, accurate, and sensitive enzyme assay has not yet been developed for this enzyme family. In this study, we optimized reaction conditions for the development of a spectrophotometric NOR activity microassay using NOC-5 for the provision of NO in solution. We also demonstrate that the assay is suitable for the quantification and characterization of P450-type NOR. The Km and kcat kinetic constants obtained by this assay were comparable to the values determined by gas chromatography, but with improved convenience and cost efficiency, effectively by miniaturization. To our knowledge, this is the first study to present the quantification of NOR activity in a kinetic microassay format.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytical Biochemistry - Volume 447, 15 February 2014, Pages 23–29
نویسندگان
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