Active as '1-Cys' thiol transferase against beta-hydroxyethyl disulfide (HED), as dehydroascorbate reductase and as dimethylarsinic acid reductase, while not active against the standard GST substrate 1-chloro-2,4-dinitrobenzene (CDNB). May be involved in cell wall organization and biogenesis. glutathione + RX = a halide anion + an S-substituted glutathione + H(+) 2 glutathione + L-dehydroascorbate = glutathione disulfide + L-ascorbate Under oxidative stress conditions. By agents such as diamide, 1-chloro-2,4-dinitrobenzene, tert-butyl hydroperoxide (t-BOOH) and cadmium in a transcriptional factors YAP1 and/or MSN2/4-dependent manner. Present with 1670 molecules/cell in log phase SD medium. A version of this protein truncated after amino acid 200 is not active in the beta-hydroxyethyl disulfide (HED) assay. Belongs to the GST superfamily. Omega family.