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This entry represents an N-terminal thioredoxin domain, which is a non-canonical thioredoxin fold-containing structural unit present in Sso1120, a protein disulfide oxidoreductase (PDO) from the hyperthermophilic archaeon Sulfolobus solfataricus. Thi ...
This entry represents an N-terminal thioredoxin domain, which is a non-canonical thioredoxin fold-containing structural unit present in Sso1120, a protein disulfide oxidoreductase (PDO) from the hyperthermophilic archaeon Sulfolobus solfataricus. This domain is composed of four beta-strands and three alpha-helices, with a well-defined disulfide bond between Cys24 and Cys45. The domain does not contain any active site but is part of the larger structure that comprises the C-terminal unit with the CTKC active site motif. The N-terminal domain shows unexpected similarity with the N-terminal domain of the alkyl hydroperoxide reductase F component from Salmonella typhimurium, and a possible involvement of this atypical PDO in a new antioxidant system of S. solfataricus has been proposed.