glutathione hydrolase hydrolase - GGT1 gene Cleaves the gamma-glutamyl bond of extracellular glutathione tripeptide Decoding the Function of Glutathione Hydrolase: An Essential Enzyme in Cellular Processes

GGT5 gene Glutathione hydrolase refers to a class of enzymes that play a crucial role in cellular metabolism and defense mechanisms. These enzymes are fundamentally hydrolases, meaning they catalyze the breaking of chemical bonds through the addition of waterBy detoxifying methylglyoxal (MG),hydroxyacylglutathione hydrolase (HAGH) may also have a pro-survival role in the metabolic stress response.. Specifically, glutathione hydrolase enzymes are involved in the breakdown or modification of glutathione, a vital tripeptide naturally produced by the body from the amino acids glycine, cysteine, and glutamic acid. The liver is a primary site of glutathione production, underpinning its involvement in numerous body processesHydroxyacylglutathione Hydrolase - an overview.

A key function observed across various glutathione hydrolase enzymes is their ability to cleave the gamma-glutamyl bond of periplasmic glutathione. This action is significant as it facilitates the breakdown of glutathione and related compounds. For instance, glutathione hydrolase 1 proenzyme, also associated with the gene GGT1, is known to initiate extracellular glutathione (GSH) breakdown. This process is critical for providing cells with a local supply of cysteine, an essential amino acid, and for maintaining intracellular GSH levelsGlutathione hydrolase 1 proenzyme. This enzyme has a specific EC number of 3.4.Details · Name:Glutathione hydrolase 1 proenzyme· Kind: protein · Synonyms. 3.4. · Gene Name: GGT1 · UniProtKB Entry: P19440Swiss-Prot · Organism: Humans.19.13 and is found in various organisms, including humans, where it is highly expressed in kidney.

The enzymatic activity of glutathione hydrolases can be broadly categorized. One significant activity is glutathione hydrolase activity, which encompasses the catalysis of the transfer of the glutamyl moiety of glutathione to various acceptors. This means these enzymes can not only break down glutathione but also transfer a part of it to other molecules, modulating their function or facilitating their transportTerm Details for "glutathione hydrolase activity" (GO:0036374). Synonyms for this activity include gamma-glutamyltranspeptidase activity and glutathionase activityGlutathione hydrolase/Glutamine Amidotransferase II complexresponsible for glutathione degradation. Both DUG2 and DUG3 are depressed under sulfur limitation .... This transfer mechanism is vital in cellular defense and detoxification pathways.

Another important member of this enzyme family is hydroxyacylglutathione hydrolase, often referred to as glyoxalase II (EC 3.作者：DA Ayorinde—Arabinogalactan-proteins (AGPs) are a family of hyperglycosylated hydroxyproline-rich glycoproteins essential for plant growth and development and generally ...1Cleaves the gamma-glutamyl bond of extracellular glutathione tripeptide(gamma-Glu-Cys-Gly) and certain glutathione conjugates (PubMed:1676842, ....2.Type: SINGLE PROTEIN ; Preferred Name:Glutathione hydrolase 1 proenzyme; organism: Homo sapiens ; Species Group: No ; Protein Target Classification: 1. Enzyme ...6). This enzyme is specifically involved in the glyoxalase system, which detoxifies reactive dicarbonyl compounds like methylglyoxal. Hydroxyacylglutathione hydrolase converts the intermediate substrate S-lactoyl-glutathione to reduced glutathione, playing a role in mitigating metabolic stress. It is classified as a thiolesterase and participates in processes related to pyruvate metabolism. The gene associated with this enzyme is sometimes denoted as HAGH. Studies have explored the implications of deficiency of glyoxalase II in genetic contexts.Glyoxalase II (EC 3.1.2.6), otherwise known as hydroxyacyl-glutathione hydrolase,converts the intermediate substrate S-lactoyl-glutathioneto reduced ...

The diversity within the glutathione hydrolase family is further illustrated by enzymes like glutathione hydrolase 5 proenzyme (GGT5)Glutathione hydrolase 5 proenzyme (P36269) - protein. This enzyme also cleaves the gamma-glutamyl bond of extracellular glutathione tripeptide (\(\gamma\)-Glu-Cys-Gly) and certain glutathione conjugates. In doing so, it hydrolyzes glutathione releasing L-Glu and Cys-Gly dipeptide. This released dipeptide is further metabolized, not only to maintain extracellular cysteine levels but also to provide cysteine for other cellular needs.

The glutathione hydrolase/Glutamine Amidotransferase II complex represents another functional unit involved in glutathione degradation. The genes DUG2 and DUG3 are mentioned in relation to this complex, indicating its importance under specific conditions like sulfur limitation.Valentine et al. (1970) described a family in which homozygotes and heterozygotes for deficiency of glyoxalase II (hydroxyacyl-glutathione hydrolase; HAGH; ...

Furthermore, some glutathione hydrolases participate in broader enzymatic systems. For example, the Human glutathione transferases (GSTs) represent a large multigene family involved in the metabolism of a wide array of electrophilic compoundsMaresins. While not strictly hydrolases, their close relationship and involvement in glutathione metabolism highlight the interconnectedness of these pathways.

In essence, glutathione hydrolase enzymes are a diverse group of proteins crucial for numerous biological functions. They are involved in cleaving the gamma-glutamyl bond of periplasmic glutathione, initiating extracellular glutathione (GSH) breakdown, catalyzing the transfer of the glutamyl moiety of glutathione, and the detoxification of harmful compounds through pathways like the glyoxalase system. Their functions contribute to cellular defense, amino acid homeostasis, and the overall metabolic well-being of an organism.Hydrolyzes and transfers gamma-glutamyl moietiesfrom glutathione and other gamma-glutamyl compounds to acceptors. The intricate roles of these hydrolases underscore their significance in maintaining health and are a testament to the complex biochemical machinery operating within living systems. The gene GGT1 and GGT5 are key players in this enzymatic network.