Title : Superoxide generation by endothelial nitric oxide synthase: the influence of cofactors.

Pub. Date : 1998 Aug 4

PMID : 9689061






7 Functional Relationships(s)
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1 Superoxide generation by endothelial nitric oxide synthase: the influence of cofactors. Superoxides nitric oxide synthase 3 Homo sapiens
2 The mechanism of superoxide generation by endothelial nitric oxide synthase (eNOS) was investigated by the electron spin resonance spin-trapping technique using 5-diethoxyphosphoryl-5-methyl-1-pyrroline N-oxide. Superoxides nitric oxide synthase 3 Homo sapiens
3 The mechanism of superoxide generation by endothelial nitric oxide synthase (eNOS) was investigated by the electron spin resonance spin-trapping technique using 5-diethoxyphosphoryl-5-methyl-1-pyrroline N-oxide. Superoxides nitric oxide synthase 3 Homo sapiens
4 In the absence of calcium/calmodulin, eNOS produces low amounts of superoxide. Superoxides nitric oxide synthase 3 Homo sapiens
5 Upon activating eNOS electron transfer reactions by calcium/calmodulin binding, superoxide formation is increased. Superoxides nitric oxide synthase 3 Homo sapiens
6 However, the concomitant addition of L-arginine and tetrahydrobiopterin (BH4) abolishes superoxide generation by eNOS. Superoxides nitric oxide synthase 3 Homo sapiens
7 Our data indicate that modulation of BH4 concentration may regulate the ratio of superoxide to nitric oxide generated by eNOS. Superoxides nitric oxide synthase 3 Homo sapiens