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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.
Gene References into Functions
the effect of specific GSTO1 and GSTO2 gene variants, independently and in interaction with established risk factors (smoking, obesity and hypertension) on the risk for the most aggressive renal cell carcinoma (RCC) subtype, the clear cell RCC, is reported. PMID: 30224590
Results showed that the variants rs11191979, rs2164624 and rs4925 of GSTO1 provide the susceptibility toward developing arsenic-induced skin lesions in individuals exposed to high-dose inorganic arsenic in northwest China. PMID: 29323258
Significant correlation between severities of skin manifestations with GSTO1 polymorphism status in arsenic-exposed population of India. PMID: 28436716
GSTO1*C is linked to the pre-stage of Alzheimer's disease; rs4925 could be a genetic marker for cognitive impairment PMID: 27259244
This study demonstrated that Distribution of the GSTO1 alleles and genotypes was nearly equal between the control group and SCA2 patients. GSTO1 genotypes were not associated to clinical markers in SCA2 patients. PMID: 28017238
GSTO1 genetic polymorphisms are associated with the progression of HBV infection. PMID: 27221910
GSTP1 and GSTO1 polymorphisms are associated with epirubicin treatment outcomes as well as with epirubicin-related toxicity. PMID: 26354850
No significant association has been found between childhood Pre-B acute lymphoblastic leukemia and GSTO1 A140D and GSTO2 N142D polymorphisms. PMID: 25726706
The present study provided epidemiological evidence for a significantly increased risk of UCB in ever smokers with the Ala/Ala genotype of the GSTO1 gene and the Arg/Arg genotype of the SULT1A1 gene. PMID: 25103078
Our results indicate that GSTO1*C/GSTO2*G haplotype is associated with increased risk of TCC. The modifying effect of GSTO2*G/G genotype on individual susceptibility to TCC is more pronounced, when associated with smoking. PMID: 25716313
This meta-analysis demonstrates that GSTO2 polymorphism may significantly increase cancer risk in Caucasian population and is associated with elevated risk of breast cancer; while GSTO1 polymorphism is not associated with cancer risk. PMID: 25300926
Our study is the first to show that the frequency of GSTO1 A140D gene polymorphism in the Turkish population is similar to other Caucasian populations and that this polymorphism is not associated with susceptibility to NSCLC. PMID: 23819933
Overexpression of GSTO1 is associated with esophageal squamous cell carcinoma. PMID: 25085586
GSTT1 active genotype and GSTO1 Asp140Asp and GSTO2 Asp142Asp genotypes may have a prognostic/pharmacogenomic role in patients with muscle invasive bladder cancer. PMID: 24040330
Genetic variants in GSTO1 are associated with increased risk for recurrent miscarriage. PMID: 24417908
The common A140D genetic polymorphism in GSTO1 was found to have significant effects on the kinetics of both the deglutathionylation and glutathionylation reactions. PMID: 23888047
The frequencies of GSTO1 and GSTO2 genotypes were not significantly different between head and neck squamous cell carcinoma cases and controls. PMID: 23086268
Single nucleotide polymorphisms (SNPs) in arsenic methyltransferase and methylene-tetrahydrofolate reductase is associated with bladder cancer in those exposed to low concentrations of inorganic arsenic. SNPs in glutathione S-transferase omega-1 are not. PMID: 22747749
GSTO-1 plays a key role in hormesis induced by low dose trichloroethylene. PMID: 21351650
Our studies confirm the lack of association between GSTO1 variants and essential hypertension risk, also for two uncommon genetic variants with large functional effects in italian patients. PMID: 22283150
Results suggest a role of GSTO1-1 in the inflammatory response and the apoptotic process and indicate that A140D and E208K polymorphisms could increase risk of developing inflammatory and apoptosis-related diseases in As-exposed populations. PMID: 22293942
low monomethylarsonic acid is associated with increased risk for MetS among As-exposed subjects and the genetic polymorphism of GSTO1 PMID: 22440634
The minor allele of GSTO1 rs4925 associates with decreased risk in familial Parkinson disease. The minor alleles of GSTO1 rs4925 and GSTO2 rs156697 SNPs associate with lower brain levels of GSTO2, but not GSTO1. PMID: 22494505
the crystal structure of a human GSTO1-1 has been determined at 1.7 A resolution in complex with the reaction product ascorbic acid PMID: 22522127
Genetic polymorphisms GSTO and As3MT modify arsenic metabolism as evidenced by altered urinary arsenic excretion PMID: 22339537
we hypothesized that GSTO1*E155del is an uncommon genetic variant associated with Alzheimer's Disease risk. PMID: 22100662
These findings supported a role of the GSTO1 rs4925 single nucleotide polymorphism in the risk of sporadic Alzheimer disease in southern Italy. PMID: 20818931
Novel folding and stability defects cause a deficiency of human glutathione transferase omega 1. PMID: 21106529
Has a role in the risk Urothelial carcinogenesis PMID: 21094982
the distribution of the GSTO2 gene differed significantly between asthmatics and controls PMID: 20374258
This study provides the allele frequencies of GSTO polymorphism in a sample consisting of 116 apparently healthy individuals of both sexes from Rome (Central Italy). PMID: 20113212
it is unlikely that glutathione S-transferases GSTA2, GSTM2, GSTO1, GSTO2, and GSTZ1 participate in breast cancer susceptibility. PMID: 19859803
GSTO1-1 overexpression appears to be associated with activation of survival pathways (Akt and ERK1/2) and inhibition of apoptotic pathways (JNK1), as well as protection against cisplatin-induced apoptosis. PMID: 20106899
The GSTO1-140Asp/GSTO2-142Asp haplotype was associated with increased risk of COPD. PMID: 19513904
polymorphisms in GSTO1 or GSTO2 do not appear to contribute to the large individual variability in arsenic metabolism or susceptibility to arsenicosis. PMID: 19635583
Data describe the functional characterization of two variants of human glutathione-s-transferase omega. PMID: 12565892
Arsenic metabolism associated hGSTO1-1 in the European ancestry group was more polymorphic than the Indigenous American Ancestry groups. Mexican Hispanics, could vary in the extent of polymorphism in these genes based upon the admixture. PMID: 12928150
a significant association was found for GSTO1 (P=0.007) and a second transcribed member of the GST omega class, GSTO2 (P=0.005), located next to GSTO1. PMID: 14570706
Our results do not confirm an association between PD and frequency of hGSTO2*N142D. PMID: 15159516
2 missense polymorphisms in exon 4 (Ala140Asp & Glu155DeltaGlu) were detected. Asp allele genotype affected CSF cholesterol, serum homocysteine. risk of vascular dementia, stroke, and early-onset Alzheimer's disease. PMID: 15623683
no association either with age-at-onset in AD cases or with disease risk in the case-control cohort but haplotype analysis revealed a modest association of one haplotype with AD risk (p = 0.04 PMID: 15917099
For E155del, the mutation frequency in Ovambo and Japanese subjects was 0.000 and 0.017, respectively, similar to those for other populations. As for E208K polymorphism, no mutation allele was found in Ovambo or Japanese subjects. PMID: 17484623
Glutathione S-transferase omega is abundant in alveolar macrophages and airway secretions, with the levels decreased in patients with chronic obstructive pulmonary disease. PMID: 17617905
The GSTO1 Asp/Asp genotype presumably modulates the severity and expansion of atherosclerosis in the circle of Willis PMID: 17717316
The prevalence of the GSTO1 140A varied significantly among different regional populations in China, which showed that geography played a more important role in the population differentiation for this allele than the ethnicity/race PMID: 18400112
Polymorphisms of glutathione S-transferase A1 and O1 and breast cancer among postmenopausal Danish women. PMID: 18414193
These results suggest a possible effect of the GSTO1 and 2 locus on age of onset of FALS. PMID: 18427999
These data establish the fact that the polymorphic deletion of Glu155 can cause GSTO1-1 deficiency in vivo. PMID: 18571971
GSTO2*N142D genotype is significantly associated with high rish of childhood acute lymhpoblastic leukemia. PMID: 18941778
Report GSTO1 gene polymorphisms in worldwide populations. PMID: 18986335
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Subcellular Location
Cytoplasm, cytosol.
Protein Families
GST superfamily, Omega family
Tissue Specificity
Ubiquitous. Highest expression in liver, pancreas, skeletal muscle, spleen, thymus, colon, blood leukocyte and heart. Lowest expression in brain, placenta and lung.