5yvn
Human Glutathione Transferase Omega1
Structural highlights
FunctionGSTO1_HUMAN Exhibits glutathione-dependent thiol transferase and dehydroascorbate reductase activities. Has S-(phenacyl)glutathione reductase activity. Has also glutathione S-transferase activity. Participates in the biotransformation of inorganic arsenic and reduces monomethylarsonic acid (MMA) and dimethylarsonic acid.[1] [2] [3] [4] [5] Publication Abstract from PubMedIn the human neuroblastoma SH-SY5Y cell line, the glutathione transferase Omega 1-1 (GSTO1-1) appears to modulate Akt and MEK1/2 kinase activation. We observed a glutathionylation modification was involved in the activation of Akt but not MEK1/2. With the specific GSTO1-1 inhibitor ML175, we show the enzyme activity of GSTO1-1 is important for modulation as the inhibited GSTO1-1 allowed activation of both Akt and MEK1/2. The inhibition of GSTO1-1 showed a similar extent of activation of Akt and MEK1/2 as treatment by the endotoxin lipopolysaccharide. The GSTO1-1 also either directly interacts with Akt and MEK1/2 or interacts with a protein complexed with Akt and MEK1/2 as both kinases coimmunoprecipitated with GSTO1-1. The results suggest that GSTO1-1 enzyme activity inhibits the activation of these two kinases to maintain basal levels. The possible regulation by GSTO1-1 is of interest as both kinases have hundreds of potential downstream targets that are known to have contributions to various cellular processes including survival, growth, proliferation, and metabolism. Glutathione transferase Omega 1-1 (GSTO1-1) modulates Akt and MEK1/2 signaling in human neuroblastoma cell SH-SY5Y.,Saisawang C, Wongsantichon J, Robinson RC, Ketterman AJ Proteins. 2019 Jul;87(7):588-595. doi: 10.1002/prot.25683. Epub 2019 Mar 25. PMID:30874320[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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