Predicted to enable oxidoreductase activity, acting on a sulfur group of donors. Predicted to be involved in antigen processing and presentation of exogenous peptide antigen via MHC class I. Predicted to act upstream of or within antigen processing and presentation of exogenous peptide antigen via MHC class II; negative regulation of fibroblast proliferation; and protein stabilization. Predicted to be located in cell junction; cytosol; and intracellular membrane-bounded organelle. Predicted to be active in lysosome. Orthologous to human IFI30 (IFI30 lysosomal thiol reductase). [provided by Alliance of Genome Resources, Apr 2022]