Glutaredoxin (GLRX) (GLRX)

Glutaredoxins (Grxs) are a family of small, glutathione-dependent oxidoreductases that are essential for maintaining the cellular redox environment and protecting against oxidative stress [Source: UniProt]. They function by catalyzing the reduction of protein disulfides and protein-S-glutathione mixed disulfides, a process known as deglutathionylation, which regulates the activity of various metabolic enzymes and signaling proteins [Source: PubMed]. Glutaredoxins are particularly important in DNA synthesis as they provide electrons to ribonucleotide reductase and play a significant role in modulating apoptosis through the redox control of transcription factors like NF-kappaB [Source: NCBI]. In clinical contexts, overexpression of glutaredoxins is associated with chemoresistance in several cancers, making them attractive targets for therapeutic inhibition to enhance the efficacy of pro-oxidant therapies [Source: Journal of Biological Chemistry]. Conversely, their dysfunction is linked to the progression of neurodegenerative disorders and chronic inflammatory diseases, where impaired redox signaling leads to protein aggregation and tissue damage [Source: Antioxidants & Redox Signaling]. Pharmacological agents like Ebselen have been identified as inhibitors of glutaredoxin activity, offering potential pathways for treating conditions characterized by redox imbalance [Source: PubMed].

Other names

ThioltransferaseGSH-dependent disulfide-bond oxidoreductaseGlutathione-dependent oxidoreductaseGrx

Glutaredoxins catalyze the reduction of protein disulfides and glutathione-mixed disulfides using glutathione as a cofactor, typically involving a nucleophilic attack by a conserved cysteine residue in the active site [Source: UniProt].