collagen-peptides-powder-with-vitamin-c The peptide methionine sulfoxide reductase (MsrA) is a vital enzyme that plays a critical role in cellular defense against oxidative stress. Its primary function is to reverse the oxidation of methionine residues, converting methionine sulfoxide back to methionine. This process is essential for maintaining protein function and cellular integrity, as oxidized methionine can lead to the inactivation of proteins and contribute to various cellular dysfunctions. The enzyme's ability to repair oxidative damage to both free methionine and methionine embedded within proteins highlights its broad protective capabilities.Findmethionine sulfoxide reductase aand related products for scientific research at MilliporeSigma.
Methionine, a sulfur-containing amino acid, is particularly susceptible to oxidation, especially under conditions of oxidative stress. Reactive oxygen species (ROS) can readily convert methionine into methionine sulfoxide. This oxidation can occur in free methionine or, more critically, within proteins.作者：A Hansel·2002·被引用次数：128—Peptide methionine sulfoxide reductase (MSRA) catalyzes the reduction of methionine sulfoxide to methionine. This widely expressed enzyme constitutes an ... When methionine residues in proteins are oxidized, it can lead to significant conformational changes, loss of enzymatic activity, and impaired protein-protein interactions, ultimately compromising cellular functions. The consequences of unchecked methionine oxidation can range from reduced cellular efficiency to contributing to the pathogenesis of various diseases.
Peptide methionine sulfoxide reductase (MsrA) acts as a cellular repair mechanism, specifically targeting oxidized methionine. The enzyme catalyzes the reduction of methionine sulfoxide (MetSO) back to methionine (Met)Peptide methionine sulfoxide reductase MsrA 2· UniProt. Find proteins for P0A085 (Staphylococcus aureus (strain MW2)). Explore P0A085. Go to UniProtKB: P0A085 .... This enzymatic activity is crucial for regenerating functional proteins and maintaining cellular homeostasisStructural Insights into a Bifunctional Peptide Methionine .... MsrA is found across all domains of life, from bacteria to humans, underscoring its conserved and fundamental importance in biological systems.
The mechanism typically involves a thiol-disulfide exchange reaction. MsrA utilizes a cysteine residue in its active site to attack the sulfoxide group of methionine, forming a transient disulfide bond with the substrate作者：B Kauffmann·2005·被引用次数：57—The peptide methionine sulfoxide reductase (Msr, EC 1.8.4.6) isone of the enzymes that allow cells to regenerate oxidized proteins, by reducing the .... A second thiol, often provided by thioredoxin or glutaredoxin, then reduces this disulfide bond, regenerating the active site cysteine of MsrA and releasing the repaired methionine作者：N Brot·2000·被引用次数：139—The oxidation ofmethioninetomethionine sulfoxideboth in vivo and in vitro can lead to the loss of biological activity in a variety of proteins..
Beyond its core function of reducing methionine sulfoxide, MsrA is implicated in a variety of cellular processes.作者：H Weissbach·2002·被引用次数：401—An enzyme,peptide methionine sulfoxide reductase(MsrA), catalyzes the reduction of methionine sulfoxide in proteins back to methionine. It is recognized as a key player in protecting cells against the damaging effects of reactive chlorine species and other oxidants. Studies have shown that MsrA is necessary for resistance to such harmful agents. Furthermore, the enzyme's presence in different cellular compartments, such as mitochondria, suggests specialized roles in organelle-specific protection against oxidative damage.
The enzyme exhibits broad substrate specificity, recognizing compounds containing a methylsulfoxide group. While MsrA is primarily known for its role in repairing protein-bound methionine, it can also reduce free methionine sulfoxide. This dual capability ensures a comprehensive defense against methionine oxidation.
The importance of peptide methionine sulfoxide reductase extends to human health作者：H Weissbach·2002·被引用次数：401—An enzyme,peptide methionine sulfoxide reductase(MsrA), catalyzes the reduction of methionine sulfoxide in proteins back to methionine.. Its role in cellular defense against oxidative stress is fundamentalPeptide methionine sulfoxide reductase: biochemistry and .... Dysregulation or deficiency in MsrA activity has been linked to increased susceptibility to oxidative damage and may contribute to the aging process and the development of age-related diseases. Research into MsrA function continues to uncover its intricate involvement in maintaining cellular health and its potential as a therapeutic target for conditions associated with oxidative stress. The ubiquitous and highly conserved nature of MSRA further emphasizes its critical role in the survival and function of organismsPeptide methionine sulfoxide reductase MsrA.
Join the newsletter to receive news, updates, new products and freebies in your inbox.