N omega-hydroxy-L-arginine is an intermediate in the biosynthesis of nitric oxide from L-arginine.
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چکیده
منابع مشابه
Multiple catalytic functions of brain nitric oxide synthase. Biochemical characterization, cofactor-requirement, and the role of N omega-hydroxy-L-arginine as an intermediate.
Brain NO (nitric oxide) synthase contains FAD, FMN, heme, and tetrahydrobiopterin as prosthetic groups and represents a multi-functional oxidoreductase catalyzing oxidation of L-arginine to NO and L-citrulline, formation of H2O2, and reduction of cytochrome c. We show that substrate analogues and inhibitors interacting with the heme block both the reductive activation of oxygen and the oxidatio...
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The vascular endothelium synthesizes nitric oxide (NO) from the terminal guanidino nitrogen atom( s) of L-arginine. NO accounts for the biological actions of endotheliumderived relaxing factor (EDRF). It is becoming apparent that the synthesis of NO from L-arginine not only explains endothelium-dependent vascular relaxation, but is a widespread mechanism for the regulation of cell function and ...
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l-Arginine (l-Arg) supplementation has been shown to enhance physical exercise capacity and delay onset of fatigue. This work investigated the potential beneficial mechanism(s) of l-Arg supplementation by examining its effect on the cellular oxidative and nitrosative stress pathways in the exercised rats. Forty-eight rats were randomly divided into six groups: sedentary control; sedentary contr...
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Patients with chronic renal and heart failure present with hypertension and widespread vasoconstriction, respectively. Although systemic release of nitric oxide (NO) may be elevated in both pathological syndromes, enhanced production of NO fails to overcome endothelial dysfunction. Plasma concentrations of L-arginine, a cationic amino acid precursor for NO synthesis, are reduced whilst levels o...
متن کاملEffect of Neutrophils on Nitric Oxide Production from Stimulated Macrophages
Background: During the initial phase of an infection, there is an upregulation of inducible nitric oxide synthase in the macrophages for the production of nitric oxide. This is followed by the recruitment of polymorphonuclear leukocytes (neutrophils) which release arginase. Arginase competes with inducible nitric oxide synthase for a common substrate L-arginine. Objective: To investigate whethe...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1991
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)38112-2