Research explores a non-canonical thioredoxin, EhTRX212, showing specificity for cystine reduction in Entamoeba histolytica, indicating its role in redox metabolism.
). Chemical modifications, on the amino group of the cysteine in disulfide substrates, impaired reduction by EhTRX212. Finally, confocal microscopy and digitonin subcellular fractionation experiments localized EhTRX212 to the trophozoite cytoplasm. This study strongly supports the existence of a novel class of TRXs with high specificity for cystine reduction, expanding our understanding of TRX function in E. histolytica and suggesting important roles for these proteins in the redox metabolism of this parasitic pathogen.
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Birocco et al. (2026) studied this question.
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