3-Nitrotyrosine (3-NT)

3-Nitrotyrosine is a modified amino acid formed via the nitration of tyrosine residues in proteins, a process primarily mediated by reactive nitrogen species such as the peroxynitrite anion and nitrogen dioxide [1, 4]. It serves as a chemically stable and prominent biological footprint of nitrosative stress and chronic inflammation [11, 12]. Although it is not a traditional therapeutic target (such as an enzyme or receptor), its accumulation is a hallmark of diverse pathological conditions, including neurodegenerative diseases like Alzheimer's and Parkinson's, cardiovascular disorders, and autoimmune conditions [2, 7, 8]. The presence of 3-nitrotyrosine can significantly alter the biochemical properties of proteins, leading to inhibited enzymatic activity, altered protein-protein interactions, and the induction of pro-apoptotic pathways [15, 17]. In clinical and pharmaceutical research, 3-nitrotyrosine is extensively utilized as a biomarker to evaluate the efficacy of antioxidant and anti-inflammatory drug candidates in reducing oxidative damage [1, 8].

Other names

3-Nitro-L-tyrosineNitrotyrosineL-Tyrosine, 3-nitro-3-Mononitrotyrosine

Not applicable as a therapeutic target; 3-nitrotyrosine serves as a diagnostic biomarker and a surrogate indicator of nitrative damage in tissues [1, 11].