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- W2079741674 abstract "A baculovirus system was used to express the oxygenase and reductase domains of human endothelial nitric-oxide synthase (ecNOS) as distinct proteins. The oxygenase domain (residues 1–491) was expressed using a vector containing a His6 tag at the N terminus. The purified oxygenase domain had an apparent molecular mass of ∼54 kDa, and retained the ability to bind L-arginine and form the ferrous CO complex. The purified reductase domain (residues 492-1244) had an apparent molecular mass of ∼82 kDa and retained the ability to catalyze NADPH-dependent cytochrome c reduction, which was enhanced 10-fold by the presence of Ca2+/calmodulin. Both purified domains exhibited immunoreactivity to rabbit anti-ecNOS IgG. The NOS activity was successfully reconstituted by mixing the two domains. These results demonstrate for the first time that the two domains of ecNOS are catalytically intact and can be reconstituted in vitro. A baculovirus system was used to express the oxygenase and reductase domains of human endothelial nitric-oxide synthase (ecNOS) as distinct proteins. The oxygenase domain (residues 1–491) was expressed using a vector containing a His6 tag at the N terminus. The purified oxygenase domain had an apparent molecular mass of ∼54 kDa, and retained the ability to bind L-arginine and form the ferrous CO complex. The purified reductase domain (residues 492-1244) had an apparent molecular mass of ∼82 kDa and retained the ability to catalyze NADPH-dependent cytochrome c reduction, which was enhanced 10-fold by the presence of Ca2+/calmodulin. Both purified domains exhibited immunoreactivity to rabbit anti-ecNOS IgG. The NOS activity was successfully reconstituted by mixing the two domains. These results demonstrate for the first time that the two domains of ecNOS are catalytically intact and can be reconstituted in vitro." @default.
- W2079741674 created "2016-06-24" @default.
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- W2079741674 date "1996-06-01" @default.
- W2079741674 modified "2023-10-16" @default.
- W2079741674 title "Endothelial Nitric-oxide Synthase" @default.
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- W2079741674 doi "https://doi.org/10.1074/jbc.271.24.14631" @default.
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