Peroxiredoxins are an ubiquitous family of peroxidases widely distributed among prokaryotes and eukaryotes. Peroxiredoxin 5, which is the last discovered mammalian member, was previously shown to reduce peroxides with the use of reducing equivalents derived from thioredoxin. We report here that human peroxiredoxin 5 is also a peroxynitrite reductase. Analysis of peroxiredoxin 5 mutants, in which each of the cysteine residues was mutated, suggests that the nucleophilic attack on the O-O bond of peroxynitrite is performed by the N-terminal peroxidatic Cys(47). Moreover, with the use of pulse radiolysis, we show that human peroxiredoxin 5 reduces peroxynitrite with an unequalled high rate constant of (7+/-3)x10(7) M(-1)s(-1).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.febslet.2004.06.080 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Androgenic Anabolic Steroids Cause Thiol Imbalance in the Vascular Endothelial Cells.
Front Biosci (Landmark Ed)
January 2025
Department of Cytobiology and Proteomics, Medical University of Lodz, 92-215 Lodz, Poland.
Background: Androgenic anabolic steroids (AASs) are synthetic drugs structurally related to testosterone, with the ability to bind to androgen receptors. Their uncontrolled use by professional and recreational sportspeople is a widespread problem. AAS abuse is correlated with severe damage to the cardiovascular system, including changes in homeostasis and coagulation disorders.
View Article and Find Full Text PDFInvolvement of PRDX6 in the protective role of MANF in acute lung injury in rats.
Exp Lung Res
January 2025
Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Hefei, China.
Acute lung injury (ALI) is a severe respiratory disease with high mortality, mainly due to overactivated oxidative stress and subsequent pyroptosis. Mesencephalic astrocyte-derived neurotrophic factor (MANF), an inducible secretory endoplasmic reticulum (ER) stress protein, inhibits lipopolysaccharide (LPS)-induced acute lung injury (ALI). However, the exact molecular mechanism remains unclear.
View Article and Find Full Text PDFPRDX2 induces tumor immune evasion by modulating the HDAC3-Galectin-9 axis in lung adenocarcinoma cells.
J Transl Med
January 2025
Joint Research Center for Occupational Medicine and Health of IHM, School of Medicine, Anhui University of Science and Technology, Huainan, Anhui, 232000, China.
Background: PRDX2 is significantly expressed in various cancers and is associated with the proliferation of tumor cells. Nonetheless, the precise mechanism of PRDX2 in tumor immunity remains incompletely understood. This study aims to investigate the impact of PRDX2, which is highly expressed in lung adenocarcinoma, on T cells in the tumor immune microenvironment, and its immune action target to promote the immune escape of lung cancer cells, to provide a theoretical basis for lung adenocarcinoma treatment with PRDX2 as the target.
View Article and Find Full Text PDFInhibited peroxidase activity of peroxiredoxin 1 by palmitic acid exacerbates nonalcoholic steatohepatitis in male mice.
Nat Commun
January 2025
NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, The province and ministry co-sponsored collaborative innovation center for medical epigenetics, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China.
Reactive oxygen species exacerbate nonalcoholic steatohepatitis (NASH) by oxidizing macromolecules; yet how they promote NASH remains poorly understood. Here, we show that peroxidase activity of global hepatic peroxiredoxin (PRDX) is significantly decreased in NASH, and palmitic acid (PA) binds to PRDX1 and inhibits its peroxidase activity. Using three genetic models, we demonstrate that hepatic PRDX1 protects against NASH in male mice.
View Article and Find Full Text PDFSecretome of the Olfactory Ensheathing Cells Influences the Behavior of Neural Stem Cells.
Int J Mol Sci
December 2024
Department of Orthopedic Surgery, E-Da Hospital, I-Shou University, Kaohsiung City 824, Taiwan.
Olfactory ensheathing cell (OEC) transplantation demonstrates promising therapeutic results in neurological disorders, such as spinal cord injury. The emerging cell-free secretome therapy compensates for the limitations of cell transplantation, such as low cell survival rates. However, the therapeutic benefits of the human OEC secretome remain unclear.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!